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//! Simple SQL code generator. May be used with pooled Sqlite3 connection. //! //! ## Usage //! //! To use `sqlite3builder`, first add this to your `Cargo.toml`: //! //! ```toml //! [dependencies] //! sqlite3builder = "0.2" //! ``` //! //! Next, add this to your crate: //! //! ``` //! extern crate sqlite3builder; //! //! use sqlite3builder::Sqlite3Builder; //! ``` //! //! # Examples: //! //! ``` //! extern crate sqlite3builder; //! //! # use std::error::Error; //! use sqlite3builder::Sqlite3Builder; //! //! # fn main() -> Result<(), Box<dyn Error>> { //! let sql = Sqlite3Builder::select_from("company") //! .field("id") //! .field("name") //! .and_where("salary > 25000") //! .sql()?; //! //! assert_eq!("SELECT id, name FROM company WHERE salary > 25000;", &sql); //! # Ok(()) //! # } //! ``` #[macro_use] extern crate log; extern crate sql_builder; use serde_json::value::Value as JValue; use sql_builder::{esc as SqlBuilderEsc, quote as SqlBuilderQuote, SqlBuilder}; use sqlite3::Cursor; use sqlite3::Value as SValue; use std::error::Error; /// Pooled Sqlite3 connection type ConnPooled = r2d2::PooledConnection<r2d2_sqlite3::SqliteConnectionManager>; /// Main Sqlite3 builder pub struct Sqlite3Builder { builder: SqlBuilder, } impl Sqlite3Builder { /// Create SELECT query. /// You may specify comma separted list of tables. /// /// ``` /// extern crate sql_builder; /// /// # use std::error::Error; /// use sqlite3builder::Sqlite3Builder; /// /// # fn main() -> Result<(), Box<dyn Error>> { /// let sql = Sqlite3Builder::select_from("books") /// .field("title") /// .field("price") /// .and_where("price > 100") /// .and_where_like("title", "Harry Potter%") /// .sql()?; /// /// assert_eq!("SELECT title, price FROM books WHERE (price > 100) AND (title LIKE 'Harry Potter%');", &sql); /// // add ^^^^^ /// // here table /// # Ok(()) /// # } /// ``` pub fn select_from(table: &str) -> Self { Self { builder: SqlBuilder::select_from(table), } } /// Create SELECT query without a table. /// /// ``` /// extern crate sql_builder; /// /// # use std::error::Error; /// use sqlite3builder::{Sqlite3Builder, quote}; /// /// # fn main() -> Result<(), Box<dyn Error>> { /// let sql = Sqlite3Builder::select_values(&["10", "e("100")]) /// .sql()?; /// /// assert_eq!("SELECT 10, '100';", &sql); /// // add ^^^^^^^^^ /// // here values /// # Ok(()) /// # } /// ``` pub fn select_values(values: &[&str]) -> Self { Self { builder: SqlBuilder::select_values(values), } } /// Create INSERT query. /// /// ``` /// extern crate sql_builder; /// /// # use std::error::Error; /// use sqlite3builder::{Sqlite3Builder, quote}; /// /// # fn main() -> Result<(), Box<dyn Error>> { /// let sql = Sqlite3Builder::insert_into("books") /// .field("title") /// .field("price") /// .values(&["e("In Search of Lost Time"), "150"]) /// .values(&["'Don Quixote', 200"]) /// .sql()?; /// /// assert_eq!("INSERT INTO books (title, price) VALUES ('In Search of Lost Time', 150), ('Don Quixote', 200);", &sql); /// // add ^^^^^ /// // here table /// # Ok(()) /// # } /// ``` pub fn insert_into(table: &str) -> Self { Self { builder: SqlBuilder::insert_into(table), } } /// Create UPDATE query. /// /// ``` /// extern crate sql_builder; /// /// # use std::error::Error; /// use sqlite3builder::Sqlite3Builder; /// /// # fn main() -> Result<(), Box<dyn Error>> { /// let sql = Sqlite3Builder::update_table("books") /// .set("price", "price + 10") /// .sql()?; /// /// assert_eq!("UPDATE books SET price = price + 10;", &sql); /// // add ^^^^^ /// // here table /// # Ok(()) /// # } /// ``` pub fn update_table(table: &str) -> Self { Self { builder: SqlBuilder::update_table(table), } } /// Create DELETE query. /// /// ``` /// extern crate sql_builder; /// /// # use std::error::Error; /// use sqlite3builder::Sqlite3Builder; /// /// # fn main() -> Result<(), Box<dyn Error>> { /// let sql = Sqlite3Builder::delete_from("books") /// .and_where("price > 100") /// .sql()?; /// /// assert_eq!("DELETE FROM books WHERE price > 100;", &sql); /// // add ^^^^^ /// // here table /// # Ok(()) /// # } /// ``` pub fn delete_from(table: &str) -> Self { Self { builder: SqlBuilder::delete_from(table), } } /// Join with table. /// /// ``` /// extern crate sql_builder; /// /// # use std::error::Error; /// use sqlite3builder::Sqlite3Builder; /// /// # fn main() -> Result<(), Box<dyn Error>> { /// let sql = Sqlite3Builder::select_from("books AS b") /// .field("b.title") /// .field("s.total") /// .join("shops AS s", Some("LEFT OUTER"), Some("ON b.id = s.book")) /// .sql()?; /// /// assert_eq!("SELECT b.title, s.total FROM books AS b LEFT OUTER JOIN shops AS s ON b.id = s.book;", &sql); /// // add ^^^^^^^^^^ ^^^^^^^^^^ ^^^^^^^^^^^^^^^^ /// // here operator table constraint /// # Ok(()) /// # } /// ``` pub fn join( &mut self, table: &str, operator: Option<&str>, constraint: Option<&str>, ) -> &mut Self { self.builder.join(table, operator, constraint); self } /// Set DISTINCT for fields. /// /// ``` /// extern crate sql_builder; /// /// # use std::error::Error; /// use sqlite3builder::Sqlite3Builder; /// /// # fn main() -> Result<(), Box<dyn Error>> { /// let sql = Sqlite3Builder::select_from("books") /// .distinct() /// .field("price") /// .sql()?; /// /// assert_eq!("SELECT DISTINCT price FROM books;", &sql); /// // add here ^^^^^^^^ /// # Ok(()) /// # } /// ``` pub fn distinct(&mut self) -> &mut Self { self.builder.distinct(); self } /// Add fields. /// /// ``` /// extern crate sql_builder; /// /// # use std::error::Error; /// use sqlite3builder::Sqlite3Builder; /// /// # fn main() -> Result<(), Box<dyn Error>> { /// let sql = Sqlite3Builder::select_from("books") /// .fields(&["title", "price"]) /// .sql()?; /// /// assert_eq!("SELECT title, price FROM books;", &sql); /// // add ^^^^^^^^^^^^ /// // here fields /// # Ok(()) /// # } /// ``` pub fn fields(&mut self, fields: &[&str]) -> &mut Self { self.builder.fields(fields); self } /// Replace fields. /// /// ``` /// extern crate sql_builder; /// /// # use std::error::Error; /// use sqlite3builder::Sqlite3Builder; /// # #[derive(Default)] /// # struct ReqData { filter: Option<String>, price_min: Option<u64>, price_max: Option<u64>, /// # limit: Option<usize>, offset: Option<usize> } /// /// # fn main() -> Result<(), Box<dyn Error>> { /// # let req_data = ReqData::default(); /// // Prepare query for total count /// /// let mut db = Sqlite3Builder::select_from("books"); /// /// db.field("COUNT(id)"); /// /// if let Some(filter) = &req_data.filter { /// let item = format!("LOWER(title) LIKE '%{}%'", filter.to_lowercase()); /// db.and_where(&item); /// } /// /// if let Some(price_min) = &req_data.price_min { /// let item = format!("price >= {}", price_min); /// db.and_where(&item); /// } /// /// if let Some(price_max) = &req_data.price_max { /// let item = format!("price <= {}", price_max); /// db.and_where(&item); /// } /// /// let sql_count = db.sql()?; /// println!("Database query: total_count: {}", &sql_count); /// /// // Prepare query for results /// /// db.set_fields(&["id", "title", "price"]); /// /// if let (Some(limit), Some(offset)) = (req_data.limit, req_data.offset) { /// db.limit(limit).offset(offset); /// } /// /// let sql_results = db.sql()?; /// println!("Database query: results: {}", &sql_results); /// # Ok(()) /// # } /// ``` pub fn set_fields(&mut self, fields: &[&str]) -> &mut Self { self.builder.set_fields(fields); self } /// Add field. /// /// ``` /// extern crate sql_builder; /// /// # use std::error::Error; /// use sqlite3builder::Sqlite3Builder; /// /// # fn main() -> Result<(), Box<dyn Error>> { /// let sql = Sqlite3Builder::select_from("books") /// .field("title") /// .field("price") /// .sql()?; /// /// assert_eq!("SELECT title, price FROM books;", &sql); /// // add ^^^^^ ^^^^^ /// // here field field /// # Ok(()) /// # } /// ``` pub fn field(&mut self, field: &str) -> &mut Self { self.builder.field(field); self } /// Replace fields with choosed one. /// /// ``` /// extern crate sql_builder; /// /// # use std::error::Error; /// use sqlite3builder::Sqlite3Builder; /// # #[derive(Default)] /// # struct ReqData { filter: Option<String>, price_min: Option<u64>, price_max: Option<u64>, /// # limit: Option<usize>, offset: Option<usize> } /// /// # fn main() -> Result<(), Box<dyn Error>> { /// # let req_data = ReqData::default(); /// // Prepare query for total count /// /// let mut db = Sqlite3Builder::select_from("books"); /// /// db.field("COUNT(id)"); /// /// if let Some(filter) = &req_data.filter { /// let item = format!("LOWER(title) LIKE '%{}%'", filter.to_lowercase()); /// db.and_where(&item); /// } /// /// if let Some(price_min) = &req_data.price_min { /// let item = format!("price >= {}", price_min); /// db.and_where(&item); /// } /// /// if let Some(price_max) = &req_data.price_max { /// let item = format!("price <= {}", price_max); /// db.and_where(&item); /// } /// /// let sql_count = db.sql()?; /// println!("Database query: total_count: {}", &sql_count); /// /// // Prepare query for results /// /// db.set_field("id"); /// db.field("title"); /// db.field("price"); /// /// if let (Some(limit), Some(offset)) = (req_data.limit, req_data.offset) { /// db.limit(limit).offset(offset); /// } /// /// let sql_results = db.sql()?; /// println!("Database query: results: {}", &sql_results); /// # Ok(()) /// # } /// ``` pub fn set_field(&mut self, field: &str) -> &mut Self { self.builder.set_field(field); self } /// Add SET part (for UPDATE). /// /// ``` /// extern crate sql_builder; /// /// # use std::error::Error; /// use sqlite3builder::Sqlite3Builder; /// /// # fn main() -> Result<(), Box<dyn Error>> { /// let sql = Sqlite3Builder::update_table("books") /// .set("price", "price + 10") /// .sql()?; /// /// assert_eq!("UPDATE books SET price = price + 10;", &sql); /// // add ^^^^^ ^^^^^^^^^^ /// // here field value /// # Ok(()) /// # } /// ``` pub fn set(&mut self, field: &str, value: &str) -> &mut Self { self.builder.set(field, value); self } /// Add VALUES part (for INSERT). /// /// ``` /// extern crate sql_builder; /// /// # use std::error::Error; /// use sqlite3builder::{Sqlite3Builder, quote}; /// /// # fn main() -> Result<(), Box<dyn Error>> { /// let sql = Sqlite3Builder::insert_into("books") /// .field("title") /// .field("price") /// .values(&["e("In Search of Lost Time"), "150"]) /// .values(&["'Don Quixote', 200"]) /// .sql()?; /// /// assert_eq!("INSERT INTO books (title, price) VALUES ('In Search of Lost Time', 150), ('Don Quixote', 200);", &sql); /// // add ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^ /// // here values values /// # Ok(()) /// # } /// ``` pub fn values(&mut self, values: &[&str]) -> &mut Self { self.builder.values(values); self } /// Add SELECT part (for INSERT). /// /// ``` /// extern crate sql_builder; /// /// # use std::error::Error; /// use sqlite3builder::Sqlite3Builder; /// /// # fn main() -> Result<(), Box<dyn Error>> { /// let query = Sqlite3Builder::select_from("warehouse") /// .field("title") /// .field("preliminary_price * 2") /// .query()?; /// /// assert_eq!("SELECT title, preliminary_price * 2 FROM warehouse", &query); /// /// let sql = Sqlite3Builder::insert_into("books") /// .field("title") /// .field("price") /// .select(&query) /// .sql()?; /// /// assert_eq!("INSERT INTO books (title, price) SELECT title, preliminary_price * 2 FROM warehouse;", &sql); /// // add ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ /// // here query /// # Ok(()) /// # } /// ``` pub fn select(&mut self, query: &str) -> &mut Self { self.builder.select(query); self } /// Add GROUP BY part. /// /// ``` /// extern crate sql_builder; /// /// # use std::error::Error; /// use sqlite3builder::{Sqlite3Builder, quote}; /// /// # fn main() -> Result<(), Box<dyn Error>> { /// let sql = Sqlite3Builder::select_from("books") /// .field("price") /// .field("COUNT(price) AS cnt") /// .group_by("price") /// .order_desc("cnt") /// .sql()?; /// /// assert_eq!("SELECT price, COUNT(price) AS cnt FROM books GROUP BY price ORDER BY cnt DESC;", &sql); /// // add ^^^^^ /// // here field /// # Ok(()) /// # } /// ``` pub fn group_by(&mut self, field: &str) -> &mut Self { self.builder.group_by(field); self } /// Add HAVING condition. /// /// ``` /// extern crate sql_builder; /// /// # use std::error::Error; /// use sqlite3builder::{Sqlite3Builder, quote}; /// /// # fn main() -> Result<(), Box<dyn Error>> { /// let sql = Sqlite3Builder::select_from("books") /// .field("price") /// .field("COUNT(price) AS cnt") /// .group_by("price") /// .having("price > 100") /// .order_desc("cnt") /// .sql()?; /// /// assert_eq!("SELECT price, COUNT(price) AS cnt FROM books GROUP BY price HAVING price > 100 ORDER BY cnt DESC;", &sql); /// // add ^^^^^^^^^^^ /// // here cond /// # Ok(()) /// # } /// ``` pub fn having(&mut self, cond: &str) -> &mut Self { self.builder.having(cond); self } /// Add WHERE condition. /// /// ``` /// extern crate sql_builder; /// /// # use std::error::Error; /// use sqlite3builder::{Sqlite3Builder, quote}; /// /// # fn main() -> Result<(), Box<dyn Error>> { /// let sql = Sqlite3Builder::select_from("books") /// .field("title") /// .field("price") /// .and_where("price > 100") /// .and_where("title LIKE 'Harry Potter%'") /// .sql()?; /// /// assert_eq!("SELECT title, price FROM books WHERE (price > 100) AND (title LIKE 'Harry Potter%');", &sql); /// // add ^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^ /// // here cond cond /// # Ok(()) /// # } /// ``` pub fn and_where(&mut self, cond: &str) -> &mut Self { self.builder.and_where(cond); self } /// Add WHERE condition for equal parts. /// /// ``` /// extern crate sql_builder; /// /// # use std::error::Error; /// use sqlite3builder::{Sqlite3Builder, quote}; /// /// # fn main() -> Result<(), Box<dyn Error>> { /// let sql = Sqlite3Builder::select_from("books") /// .field("price") /// .and_where_eq("title", "e("Harry Potter and the Philosopher's Stone")) /// .sql()?; /// /// assert_eq!("SELECT price FROM books WHERE title = 'Harry Potter and the Philosopher''s Stone';", &sql); /// // add ^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ /// // here field value /// # Ok(()) /// # } /// ``` pub fn and_where_eq(&mut self, field: &str, value: &str) -> &mut Self { self.builder.and_where_eq(field, value); self } /// Add WHERE condition for non-equal parts. /// /// ``` /// extern crate sql_builder; /// /// # use std::error::Error; /// use sqlite3builder::{Sqlite3Builder, quote}; /// /// # fn main() -> Result<(), Box<dyn Error>> { /// let sql = Sqlite3Builder::select_from("books") /// .field("price") /// .and_where_ne("title", "e("Harry Potter and the Philosopher's Stone")) /// .sql()?; /// /// assert_eq!("SELECT price FROM books WHERE title <> 'Harry Potter and the Philosopher''s Stone';", &sql); /// // add ^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ /// // here field value /// # Ok(()) /// # } /// ``` pub fn and_where_ne(&mut self, field: &str, value: &str) -> &mut Self { self.builder.and_where_ne(field, value); self } /// Add WHERE LIKE condition. /// /// ``` /// extern crate sqlite3builder; /// /// # use std::error::Error; /// use sqlite3builder::Sqlite3Builder; /// /// # fn main() -> Result<(), Box<dyn Error>> { /// let sql = Sqlite3Builder::select_from("books") /// .field("price") /// .and_where_like("title", "%Philosopher's%") /// .sql()?; /// /// assert_eq!("SELECT price FROM books WHERE title LIKE '%Philosopher''s%';", &sql); /// // add ^^^^^ ^^^^^^^^^^^^^^^^ /// // here field mask /// # Ok(()) /// # } /// ``` pub fn and_where_like(&mut self, field: &str, mask: &str) -> &mut Self { self.builder.and_where_like(field, mask); self } /// Add WHERE NOT LIKE condition. /// /// ``` /// extern crate sqlite3builder; /// /// # use std::error::Error; /// use sqlite3builder::Sqlite3Builder; /// /// # fn main() -> Result<(), Box<dyn Error>> { /// let sql = Sqlite3Builder::select_from("books") /// .field("title") /// .and_where_not_like("title", "%Alice's%") /// .sql()?; /// /// assert_eq!("SELECT title FROM books WHERE title NOT LIKE '%Alice''s%';", &sql); /// // add ^^^^^ ^^^^^^^^^^ /// // here field mask /// # Ok(()) /// # } /// ``` pub fn and_where_not_like(&mut self, field: &str, mask: &str) -> &mut Self { self.builder.and_where_not_like(field, mask); self } /// Add WHERE IS NULL condition. /// /// ``` /// extern crate sqlite3builder; /// /// # use std::error::Error; /// use sqlite3builder::Sqlite3Builder; /// /// # fn main() -> Result<(), Box<dyn Error>> { /// let sql = Sqlite3Builder::select_from("books") /// .field("title") /// .and_where_is_null("price") /// .sql()?; /// /// assert_eq!("SELECT title FROM books WHERE price IS NULL;", &sql); /// // add ^^^^^ /// // here field /// # Ok(()) /// # } /// ``` pub fn and_where_is_null(&mut self, field: &str) -> &mut Self { self.builder.and_where_is_null(field); self } /// Add WHERE IS NOT NULL condition. /// /// ``` /// extern crate sqlite3builder; /// /// # use std::error::Error; /// use sqlite3builder::Sqlite3Builder; /// /// # fn main() -> Result<(), Box<dyn Error>> { /// let sql = Sqlite3Builder::select_from("books") /// .field("title") /// .and_where_is_not_null("price") /// .sql()?; /// /// assert_eq!("SELECT title FROM books WHERE price IS NOT NULL;", &sql); /// // add ^^^^^ /// // here field /// # Ok(()) /// # } /// ``` pub fn and_where_is_not_null(&mut self, field: &str) -> &mut Self { self.builder.and_where_is_not_null(field); self } /// Union query with subquery. /// ORDER BY must be in the last subquery. /// /// ``` /// extern crate sqlite3builder; /// /// # use std::error::Error; /// use sqlite3builder::Sqlite3Builder; /// /// # fn main() -> Result<(), Box<dyn Error>> { /// let append = Sqlite3Builder::select_from("books") /// .field("title") /// .field("price") /// .and_where("price < 100") /// .order_asc("title") /// .query()?; /// /// let sql = Sqlite3Builder::select_from("books") /// .field("title") /// .field("price") /// .and_where_like("title", "Harry Potter%") /// .order_desc("price") /// .union(&append) /// .sql()?; /// /// assert_eq!("SELECT title, price FROM books WHERE title LIKE 'Harry Potter%' UNION SELECT title, price FROM books WHERE price < 100 ORDER BY title;", &sql); /// // add ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ /// // here query /// # Ok(()) /// # } /// ``` pub fn union(&mut self, query: &str) -> &mut Self { self.builder.union(query); self } /// Union query with all subquery. /// ORDER BY must be in the last subquery. /// /// ``` /// extern crate sqlite3builder; /// /// # use std::error::Error; /// use sqlite3builder::Sqlite3Builder; /// /// # fn main() -> Result<(), Box<dyn Error>> { /// let append = Sqlite3Builder::select_values(&["'The Great Gatsby'", "124"]) /// .query_values()?; /// /// let sql = Sqlite3Builder::select_from("books") /// .field("title") /// .field("price") /// .and_where_like("title", "Harry Potter%") /// .order_desc("price") /// .union_all(&append) /// .sql()?; /// /// assert_eq!("SELECT title, price FROM books WHERE title LIKE 'Harry Potter%' UNION ALL SELECT 'The Great Gatsby', 124;", &sql); /// // add ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ /// // here query /// # Ok(()) /// # } /// ``` pub fn union_all(&mut self, query: &str) -> &mut Self { self.builder.union_all(query); self } /// Add ORDER BY. /// /// ``` /// extern crate sql_builder; /// /// # use std::error::Error; /// use sqlite3builder::Sqlite3Builder; /// /// # fn main() -> Result<(), Box<dyn Error>> { /// let sql = Sqlite3Builder::select_from("books") /// .field("title") /// .field("price") /// .and_where_like("title", "Harry Potter%") /// .order_by("price", false) /// .sql()?; /// /// assert_eq!("SELECT title, price FROM books WHERE title LIKE 'Harry Potter%' ORDER BY price;", &sql); /// // add ^^^^^ /// // here field /// # Ok(()) /// # } /// ``` pub fn order_by(&mut self, field: &str, desc: bool) -> &mut Self { self.builder.order_by(field, desc); self } /// Add ORDER BY ASC. /// /// ``` /// extern crate sql_builder; /// /// # use std::error::Error; /// use sqlite3builder::Sqlite3Builder; /// /// # fn main() -> Result<(), Box<dyn Error>> { /// let sql = Sqlite3Builder::select_from("books") /// .field("title") /// .field("price") /// .and_where_like("title", "Harry Potter%") /// .order_asc("title") /// .sql()?; /// /// assert_eq!("SELECT title, price FROM books WHERE title LIKE 'Harry Potter%' ORDER BY title;", &sql); /// // add ^^^^^ /// // here field /// # Ok(()) /// # } /// ``` pub fn order_asc(&mut self, field: &str) -> &mut Self { self.builder.order_asc(field); self } /// Add ORDER BY DESC. /// /// ``` /// extern crate sql_builder; /// /// # use std::error::Error; /// use sqlite3builder::Sqlite3Builder; /// /// # fn main() -> Result<(), Box<dyn Error>> { /// let sql = Sqlite3Builder::select_from("books") /// .field("title") /// .field("price") /// .and_where_like("title", "Harry Potter%") /// .order_desc("price") /// .sql()?; /// /// assert_eq!("SELECT title, price FROM books WHERE title LIKE 'Harry Potter%' ORDER BY price DESC;", &sql); /// // add ^^^^^ /// // here field /// # Ok(()) /// # } /// ``` pub fn order_desc(&mut self, field: &str) -> &mut Self { self.builder.order_desc(field); self } /// Set LIMIT. /// /// ``` /// extern crate sql_builder; /// /// # use std::error::Error; /// use sqlite3builder::Sqlite3Builder; /// /// # fn main() -> Result<(), Box<dyn Error>> { /// let sql = Sqlite3Builder::select_from("books") /// .field("title") /// .field("price") /// .and_where_like("title", "Harry Potter%") /// .order_desc("price") /// .limit(10) /// .sql()?; /// /// assert_eq!("SELECT title, price FROM books WHERE title LIKE 'Harry Potter%' ORDER BY price DESC LIMIT 10;", &sql); /// // add ^^ /// // here limit /// # Ok(()) /// # } /// ``` pub fn limit(&mut self, limit: usize) -> &mut Self { self.builder.limit(limit); self } /// Set OFFSET. /// /// ``` /// extern crate sql_builder; /// /// # use std::error::Error; /// use sqlite3builder::Sqlite3Builder; /// /// # fn main() -> Result<(), Box<dyn Error>> { /// let sql = Sqlite3Builder::select_from("books") /// .field("title") /// .field("price") /// .and_where_like("title", "Harry Potter%") /// .order_desc("price") /// .limit(10) /// .offset(100) /// .sql()?; /// /// assert_eq!("SELECT title, price FROM books WHERE title LIKE 'Harry Potter%' ORDER BY price DESC LIMIT 10 OFFSET 100;", &sql); /// // add ^^^ /// // here offset /// # Ok(()) /// # } /// ``` pub fn offset(&mut self, offset: usize) -> &mut Self { self.builder.offset(offset); self } /// Build complete SQL command. /// /// ``` /// extern crate sql_builder; /// /// # use std::error::Error; /// use sqlite3builder::Sqlite3Builder; /// /// # fn main() -> Result<(), Box<dyn Error>> { /// let sql = Sqlite3Builder::select_from("books").sql()?; /// /// assert_eq!("SELECT * FROM books;", &sql); /// # Ok(()) /// # } /// ``` pub fn sql(&self) -> Result<String, Box<dyn Error>> { self.builder.sql() } /// Build subquery SQL command. /// /// ``` /// extern crate sql_builder; /// /// # use std::error::Error; /// use sqlite3builder::Sqlite3Builder; /// /// # fn main() -> Result<(), Box<dyn Error>> { /// let cat = Sqlite3Builder::select_from("books") /// .field("CASE WHEN price < 100 THEN 'cheap' ELSE 'expensive' END AS category") /// .subquery()?; /// /// assert_eq!("(SELECT CASE WHEN price < 100 THEN 'cheap' ELSE 'expensive' END AS category FROM books)", &cat); /// /// let sql = Sqlite3Builder::select_from(&cat) /// .field("category") /// .field("COUNT(category) AS cnt") /// .group_by("category") /// .order_desc("cnt") /// .order_asc("category") /// .sql()?; /// /// assert_eq!("SELECT category, COUNT(category) AS cnt FROM (SELECT CASE WHEN price < 100 THEN 'cheap' ELSE 'expensive' END AS category FROM books) GROUP BY category ORDER BY cnt DESC, category;", &sql); /// # Ok(()) /// # } /// ``` pub fn subquery(&self) -> Result<String, Box<dyn Error>> { self.builder.subquery() } /// Build named subquery SQL command /// /// ``` /// extern crate sql_builder; /// /// # use std::error::Error; /// use sqlite3builder::Sqlite3Builder; /// /// # fn main() -> Result<(), Box<dyn Error>> { /// let cat = Sqlite3Builder::select_from("books") /// .field("CASE WHEN price < 100 THEN 'cheap' ELSE 'expensive' END") /// .subquery_as("category")?; /// /// assert_eq!("(SELECT CASE WHEN price < 100 THEN 'cheap' ELSE 'expensive' END FROM books) AS category", &cat); /// // add ^^^^^^^^ /// // here name /// /// let sql = Sqlite3Builder::select_from("books") /// .field("title") /// .field("price") /// .field(&cat) /// .sql()?; /// /// assert_eq!("SELECT title, price, (SELECT CASE WHEN price < 100 THEN 'cheap' ELSE 'expensive' END FROM books) AS category FROM books;", &sql); /// # Ok(()) /// # } /// ``` pub fn subquery_as(&self, name: &str) -> Result<String, Box<dyn Error>> { self.builder.subquery_as(name) } /// SQL command generator for query or subquery. /// /// ``` /// extern crate sql_builder; /// /// # use std::error::Error; /// use sqlite3builder::Sqlite3Builder; /// /// # fn main() -> Result<(), Box<dyn Error>> { /// let query = Sqlite3Builder::select_from("warehouse") /// .field("title") /// .field("preliminary_price * 2") /// .query()?; /// /// assert_eq!("SELECT title, preliminary_price * 2 FROM warehouse", &query); /// /// let sql = Sqlite3Builder::insert_into("books") /// .field("title") /// .field("price") /// .select(&query) /// .sql()?; /// /// assert_eq!("INSERT INTO books (title, price) SELECT title, preliminary_price * 2 FROM warehouse;", &sql); /// # Ok(()) /// # } /// ``` pub fn query(&self) -> Result<String, Box<dyn Error>> { self.builder.query() } /// SQL command generator for query or subquery without a table. /// /// ``` /// extern crate sql_builder; /// /// # use std::error::Error; /// use sqlite3builder::{Sqlite3Builder, quote}; /// /// # fn main() -> Result<(), Box<dyn Error>> { /// let values = Sqlite3Builder::select_values(&["10", "e("100")]) /// .query_values()?; /// /// assert_eq!("SELECT 10, '100'", &values); /// # Ok(()) /// # } /// ``` pub fn query_values(&self) -> Result<String, Box<dyn Error>> { self.builder.query_values() } /// Convert sqlite3::Value to serde_json::Value fn s2j(src: &SValue) -> Result<JValue, Box<dyn Error>> { match src { SValue::Null => Ok(JValue::Null), SValue::Integer(val) => Ok(JValue::Number((*val).into())), SValue::String(val) => Ok(JValue::String(val.clone())), _ => Err("Unsupported type".into()), } } /// Execute request pub fn exec(&self, conn: &ConnPooled) -> Result<(), Box<dyn Error>> { let sql = self.builder.sql()?; debug!("Exec sql = {}", &sql); conn.execute(sql).map_err(|err| err.into()) } /// Execute and return all data pub fn get(&self, conn: &ConnPooled) -> Result<Vec<Vec<JValue>>, Box<dyn Error>> { let sql = self.builder.sql()?; debug!("Get rows sql = {}", &sql); let mut result = Vec::new(); let mut cursor = conn.prepare(sql)?.cursor(); while let Some(row) = cursor.next()? { let jrow = row .iter() .map(|val| Self::s2j(&val).unwrap()) .collect::<Vec<JValue>>(); result.push(jrow); } Ok(result) } /// Execute and return first row pub fn get_row(&self, conn: &ConnPooled) -> Result<Vec<JValue>, Box<dyn Error>> { let sql = self.builder.sql()?; debug!("Get row sql = {}", &sql); let mut cursor = conn.prepare(sql)?.cursor(); let first_row = if let Some(row) = cursor.next()? { row.iter() .map(|val| Self::s2j(&val).unwrap()) .collect::<Vec<JValue>>() } else { Vec::new() }; Ok(first_row) } /// Execute and return first value pub fn get_value(&self, conn: &ConnPooled) -> Result<JValue, Box<dyn Error>> { let sql = self.builder.sql()?; debug!("Get value sql = {}", &sql); let mut cursor = conn.prepare(sql)?.cursor(); let first_value = if let Some(row) = cursor.next()? { Self::s2j(&row[0])? } else { return Err("No any value".into()); }; Ok(first_value) } /// Execute and return first integer value pub fn get_int(&self, conn: &ConnPooled) -> Result<i64, Box<dyn Error>> { Ok(self.get_value(&conn)?.as_i64().unwrap()) } /// Execute and return first string value pub fn get_str(&self, conn: &ConnPooled) -> Result<String, Box<dyn Error>> { Ok(self.get_value(&conn)?.as_str().unwrap().to_string()) } /// Get cursor for request pub fn get_cursor<'a>(&'a self, conn: &'a ConnPooled) -> Result<Cursor<'a>, Box<dyn Error>> { let sql = self.builder.sql()?; debug!("Get cursor sql = {}", &sql); let cursor = conn.prepare(sql)?.cursor(); Ok(cursor) } } /// Escape string for SQL. pub fn esc(src: &str) -> String { SqlBuilderEsc(src) } /// Quote string for SQL. pub fn quote(src: &str) -> String { SqlBuilderQuote(src) } #[cfg(test)] mod tests { use super::*; #[test] fn test_esc() -> Result<(), Box<dyn Error>> { let sql = esc("Hello, 'World'"); assert_eq!(&sql, "Hello, ''World''"); Ok(()) } #[test] fn test_quote() -> Result<(), Box<dyn Error>> { let sql = quote("Hello, 'World'"); assert_eq!(&sql, "'Hello, ''World'''"); Ok(()) } #[test] fn test_select_only_values() -> Result<(), Box<dyn Error>> { let values = Sqlite3Builder::select_values(&["10", "e("100")]).sql()?; assert_eq!("SELECT 10, '100';", &values); Ok(()) } #[test] fn test_select_all_books() -> Result<(), Box<dyn Error>> { let sql = Sqlite3Builder::select_from("books").sql()?; assert_eq!(&sql, "SELECT * FROM books;"); Ok(()) } #[test] fn test_show_all_prices() -> Result<(), Box<dyn Error>> { let sql = Sqlite3Builder::select_from("books") .distinct() .field("price") .sql()?; assert_eq!(&sql, "SELECT DISTINCT price FROM books;"); Ok(()) } #[test] fn test_select_title_and_price() -> Result<(), Box<dyn Error>> { let sql = Sqlite3Builder::select_from("books") .fields(&["title", "price"]) .sql()?; assert_eq!(&sql, "SELECT title, price FROM books;"); let sql = Sqlite3Builder::select_from("books") .field("title") .field("price") .sql()?; assert_eq!(&sql, "SELECT title, price FROM books;"); Ok(()) } #[test] fn test_select_expensive_books() -> Result<(), Box<dyn Error>> { let sql = Sqlite3Builder::select_from("books") .field("title") .field("price") .and_where("price > 100") .sql()?; assert_eq!(&sql, "SELECT title, price FROM books WHERE price > 100;"); Ok(()) } #[test] fn test_select_price_for_harry_potter_and_phil_stone() -> Result<(), Box<dyn Error>> { let sql = Sqlite3Builder::select_from("books") .field("price") .and_where_eq("title", "e("Harry Potter and the Philosopher's Stone")) .sql()?; assert_eq!( &sql, "SELECT price FROM books WHERE title = 'Harry Potter and the Philosopher''s Stone';" ); Ok(()) } #[test] fn test_select_price_not_for_harry_potter_and_phil_stone() -> Result<(), Box<dyn Error>> { let sql = Sqlite3Builder::select_from("books") .field("price") .and_where_ne("title", "e("Harry Potter and the Philosopher's Stone")) .sql()?; assert_eq!( &sql, "SELECT price FROM books WHERE title <> 'Harry Potter and the Philosopher''s Stone';" ); Ok(()) } #[test] fn test_select_expensive_harry_potter() -> Result<(), Box<dyn Error>> { let sql = Sqlite3Builder::select_from("books") .field("title") .field("price") .and_where("price > 100") .and_where_like("title", "Harry Potter%") .sql()?; assert_eq!( &sql, "SELECT title, price FROM books WHERE (price > 100) AND (title LIKE 'Harry Potter%');" ); Ok(()) } #[test] fn test_order_harry_potter_by_price() -> Result<(), Box<dyn Error>> { let sql = Sqlite3Builder::select_from("books") .field("title") .field("price") .and_where_like("title", "Harry Potter%") .order_by("price", false) .sql()?; assert_eq!( &sql, "SELECT title, price FROM books WHERE title LIKE 'Harry Potter%' ORDER BY price;" ); let sql = Sqlite3Builder::select_from("books") .field("title") .field("price") .and_where_like("title", "Harry Potter%") .order_desc("price") .sql()?; assert_eq!( &sql, "SELECT title, price FROM books WHERE title LIKE 'Harry Potter%' ORDER BY price DESC;" ); let sql = Sqlite3Builder::select_from("books") .field("title") .field("price") .and_where_like("title", "Harry Potter%") .order_desc("price") .order_asc("title") .sql()?; assert_eq!(&sql, "SELECT title, price FROM books WHERE title LIKE 'Harry Potter%' ORDER BY price DESC, title;"); Ok(()) } #[test] fn test_find_cheap_or_harry_potter() -> Result<(), Box<dyn Error>> { let append = Sqlite3Builder::select_from("books") .field("title") .field("price") .and_where("price < 100") .order_asc("title") .query()?; let sql = Sqlite3Builder::select_from("books") .field("title") .field("price") .and_where_like("title", "Harry Potter%") .order_desc("price") .union(&append) .sql()?; assert_eq!( "SELECT title, price FROM books WHERE title LIKE 'Harry Potter%' UNION SELECT title, price FROM books WHERE price < 100 ORDER BY title;", &sql ); let append = Sqlite3Builder::select_values(&["'The Great Gatsby'", "124"]).query_values()?; let sql = Sqlite3Builder::select_from("books") .field("title") .field("price") .and_where_like("title", "Harry Potter%") .order_desc("price") .union_all(&append) .sql()?; assert_eq!( "SELECT title, price FROM books WHERE title LIKE 'Harry Potter%' UNION ALL SELECT 'The Great Gatsby', 124;", &sql ); Ok(()) } #[test] fn test_select_first_3_harry_potter_books() -> Result<(), Box<dyn Error>> { let sql = Sqlite3Builder::select_from("books") .field("title") .field("price") .and_where_like("title", "Harry Potter%") .order_asc("title") .limit(3) .sql()?; assert_eq!(&sql, "SELECT title, price FROM books WHERE title LIKE 'Harry Potter%' ORDER BY title LIMIT 3;"); Ok(()) } #[test] fn test_select_harry_potter_from_second_book() -> Result<(), Box<dyn Error>> { let sql = Sqlite3Builder::select_from("books") .field("title") .field("price") .and_where_like("title", "Harry Potter%") .order_asc("title") .offset(2) .sql()?; assert_eq!(&sql, "SELECT title, price FROM books WHERE title LIKE 'Harry Potter%' ORDER BY title OFFSET 2;"); let sql = Sqlite3Builder::select_from("books") .field("title") .field("price") .and_where_like("title", "Harry Potter%") .order_asc("title") .limit(3) .offset(2) .sql()?; assert_eq!(&sql, "SELECT title, price FROM books WHERE title LIKE 'Harry Potter%' ORDER BY title LIMIT 3 OFFSET 2;"); Ok(()) } #[test] fn test_find_books_not_about_alice() -> Result<(), Box<dyn Error>> { let sql = Sqlite3Builder::select_from("books") .field("title") .and_where_not_like("title", "%Alice's%") .sql()?; assert_eq!( "SELECT title FROM books WHERE title NOT LIKE '%Alice''s%';", &sql ); Ok(()) } #[test] fn test_books_without_price() -> Result<(), Box<dyn Error>> { let sql = Sqlite3Builder::select_from("books") .field("title") .and_where_is_null("price") .sql()?; assert_eq!(&sql, "SELECT title FROM books WHERE price IS NULL;"); let sql = Sqlite3Builder::select_from("books") .field("title") .and_where_is_not_null("price") .sql()?; assert_eq!(&sql, "SELECT title FROM books WHERE price IS NOT NULL;"); Ok(()) } #[test] fn test_group_books_by_price() -> Result<(), Box<dyn Error>> { let sql = Sqlite3Builder::select_from("books") .field("price") .field("COUNT(price) AS cnt") .group_by("price") .order_desc("cnt") .sql()?; assert_eq!( &sql, "SELECT price, COUNT(price) AS cnt FROM books GROUP BY price ORDER BY cnt DESC;" ); let sql = Sqlite3Builder::select_from("books") .field("price") .field("COUNT(price) AS cnt") .group_by("price") .having("price > 100") .order_desc("cnt") .sql()?; assert_eq!(&sql, "SELECT price, COUNT(price) AS cnt FROM books GROUP BY price HAVING price > 100 ORDER BY cnt DESC;"); Ok(()) } #[test] fn test_group_books_by_price_category() -> Result<(), Box<dyn Error>> { let cat = Sqlite3Builder::select_from("books") .field("CASE WHEN price < 100 THEN 'cheap' ELSE 'expensive' END AS category") .subquery()?; assert_eq!("(SELECT CASE WHEN price < 100 THEN 'cheap' ELSE 'expensive' END AS category FROM books)", &cat); let sql = Sqlite3Builder::select_from(&cat) .field("category") .field("COUNT(category) AS cnt") .group_by("category") .order_desc("cnt") .order_asc("category") .sql()?; assert_eq!("SELECT category, COUNT(category) AS cnt FROM (SELECT CASE WHEN price < 100 THEN 'cheap' ELSE 'expensive' END AS category FROM books) GROUP BY category ORDER BY cnt DESC, category;", &sql); let cat = Sqlite3Builder::select_from("books") .field("CASE WHEN price < 100 THEN 'cheap' ELSE 'expensive' END") .subquery_as("category")?; assert_eq!("(SELECT CASE WHEN price < 100 THEN 'cheap' ELSE 'expensive' END FROM books) AS category", &cat); let sql = Sqlite3Builder::select_from("books") .field("title") .field("price") .field(&cat) .sql()?; assert_eq!("SELECT title, price, (SELECT CASE WHEN price < 100 THEN 'cheap' ELSE 'expensive' END FROM books) AS category FROM books;", &sql); Ok(()) } #[test] fn test_grow_price() -> Result<(), Box<dyn Error>> { let sql = Sqlite3Builder::update_table("books") .set("price", "price + 10") .sql()?; assert_eq!(&sql, "UPDATE books SET price = price + 10;"); let sql = Sqlite3Builder::update_table("books") .set("price", "price * 0.1") .and_where_like("title", "Harry Potter%") .sql()?; assert_eq!( &sql, "UPDATE books SET price = price * 0.1 WHERE title LIKE 'Harry Potter%';" ); Ok(()) } #[test] fn test_add_new_books() -> Result<(), Box<dyn Error>> { let sql = Sqlite3Builder::insert_into("books") .field("title") .field("price") .values(&["e("In Search of Lost Time"), "150"]) .values(&["'Don Quixote', 200"]) .sql()?; assert_eq!(&sql, "INSERT INTO books (title, price) VALUES ('In Search of Lost Time', 150), ('Don Quixote', 200);"); Ok(()) } #[test] fn test_add_books_from_warehouse() -> Result<(), Box<dyn Error>> { let query = Sqlite3Builder::select_from("warehouse") .field("title") .field("preliminary_price * 2") .query()?; assert_eq!("SELECT title, preliminary_price * 2 FROM warehouse", &query); let sql = Sqlite3Builder::insert_into("books") .field("title") .field("price") .select(&query) .sql()?; assert_eq!( "INSERT INTO books (title, price) SELECT title, preliminary_price * 2 FROM warehouse;", &sql ); Ok(()) } #[test] fn test_sold_all_harry_potter() -> Result<(), Box<dyn Error>> { let sql = Sqlite3Builder::update_table("books") .set("price", "0") .set("title", "'[SOLD!]' || title") .and_where_like("title", "Harry Potter%") .sql()?; assert_eq!(&sql, "UPDATE books SET price = 0, title = '[SOLD!]' || title WHERE title LIKE 'Harry Potter%';"); Ok(()) } #[test] fn test_remove_all_expensive_books() -> Result<(), Box<dyn Error>> { let sql = Sqlite3Builder::delete_from("books") .and_where("price > 100") .sql()?; assert_eq!(&sql, "DELETE FROM books WHERE price > 100;"); Ok(()) } #[test] fn test_count_books_in_shops() -> Result<(), Box<dyn Error>> { let sql = Sqlite3Builder::select_from("books AS b") .field("b.title") .field("s.total") .join("shops AS s", Some("LEFT OUTER"), Some("ON b.id = s.book")) .sql()?; assert_eq!( &sql, "SELECT b.title, s.total FROM books AS b LEFT OUTER JOIN shops AS s ON b.id = s.book;" ); Ok(()) } }