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pub mod filter_and;
pub mod filter_or;
pub use filter_and::FilterAnd;
pub use filter_or::FilterOr;
use std::{fmt::Debug, marker::PhantomData};
use super::ArelStatement;
use crate::prelude::Arel;
pub(crate) trait ArelSubFilterStatement: Debug {
fn sqls(&self) -> Option<&Vec<crate::Sql>>;
fn sqls_mut(&mut self) -> Option<&mut Vec<crate::Sql>>;
fn join_str(&self) -> &'static str;
// 按值从小到大排序
// fn order(&self) -> i32 {
// 0
// }
fn to_sql(&self) -> Option<crate::Sql> {
match self.sqls() {
Some(sqls) => {
let mut final_sql = crate::Sql::default();
let len = sqls.len();
if len > 0 {
for (idx, sql) in sqls.iter().enumerate() {
final_sql.push_sql(sql.clone());
if idx < len - 1 {
final_sql.push_str(self.join_str());
}
}
Some(final_sql)
} else {
None
}
}
None => None,
}
}
}
#[derive(Debug)]
pub struct Filter<M: Arel> {
sub_filters: Vec<Box<dyn ArelSubFilterStatement>>,
_marker: PhantomData<M>,
}
impl<T: Arel> ArelStatement for Filter<T> {
fn to_sql(&self) -> Option<crate::Sql> {
let sub_filters: Vec<&Box<dyn ArelSubFilterStatement>> = self.sub_filters.iter().collect();
if self.sub_filters.len() > 0 {
let mut final_sql = crate::Sql::new("");
// sub_filters.sort_by(|a, b| a.order().partial_cmp(&b.order()).unwrap());
for (idx, sub_filters) in sub_filters.into_iter().enumerate() {
let sql = sub_filters.to_sql();
if let Some(sql) = sql {
if idx >= 1 {
final_sql.push_str(sub_filters.join_str());
}
final_sql.push('(').push_sql(sql).push(')');
}
}
Some(final_sql)
} else {
None
}
}
}
impl<M: Arel> Filter<M> {
pub fn new() -> Self {
Self {
sub_filters: vec![],
_marker: PhantomData::<M>,
}
}
/// # Examples
///
/// ```
/// use arel::prelude::*;
/// use arel::statements::filter::Filter;
/// #[arel]
/// struct User {}
/// impl Arel for User {}
/// let mut filter = Filter::<User>::new();
/// filter.filter_and("username", "sanmu");
/// assert_eq!(filter.to_sql().unwrap().to_sql_string().unwrap(), r#"("user"."username" = ?{"String":"sanmu"})"#);
///
/// filter.filter_and("age", vec![18, 20]);
/// assert_eq!(filter.to_sql().unwrap().to_sql_string().unwrap(), r#"("user"."username" = ?{"String":"sanmu"}) AND ("user"."age" IN (18,20))"#);
///
/// ```
pub fn filter_and<K: AsRef<str>, V: Into<crate::Value>>(&mut self, key: K, value: V) -> &mut Self {
self.filter_and_pairs(vec![(key, value)])
}
/// # Examples
///
/// ```
/// use arel::prelude::*;
/// use arel::statements::filter::Filter;
/// #[arel]
/// struct User {}
/// impl Arel for User {}
/// let mut filter = Filter::<User>::new();
/// filter.filter_and_pairs(vec![("username", Into::<arel::Value>::into("sanmu")), ("age", Into::<arel::Value>::into(vec![18, 20]))]);
/// assert_eq!(filter.to_sql().unwrap().to_sql_string().unwrap(), r#"("user"."username" = ?{"String":"sanmu"} AND "user"."age" IN (18,20))"#);
///
/// filter.filter_and("gender", "male");
/// assert_eq!(filter.to_sql().unwrap().to_sql_string().unwrap(), r#"("user"."username" = ?{"String":"sanmu"} AND "user"."age" IN (18,20)) AND ("user"."gender" = ?{"String":"male"})"#);
///
/// ```
pub fn filter_and_pairs<K: AsRef<str>, V: Into<crate::Value>>(&mut self, pairs: Vec<(K, V)>) -> &mut Self {
let table_name = M::table_name();
let mut filter_and = FilterAnd::default();
for (key, value) in pairs.into_iter() {
let mut sql = crate::Sql::default();
let value: crate::Value = value.into();
match &value {
crate::Value::Array(_) => {
sql.push_str(format!(r#""{}"."{}""#, table_name, key.as_ref()));
if let Some(v_sql) = value.to_sql() {
sql.push_str(" IN ").push_sql(v_sql);
} else {
sql.push_str(" IS NULL");
}
}
_ => {
sql.push_str(format!(r#""{}"."{}""#, table_name, key.as_ref()));
if let Some(v_sql) = value.to_sql() {
sql.push_str(" = ").push_sql(v_sql);
} else {
sql.push_str(" IS NULL");
}
}
}
filter_and.sqls.push(sql);
}
self.sub_filters.push(Box::new(filter_and));
self
}
pub fn filter_and_sql<S: Into<crate::Sql>>(&mut self, sql: S) -> &mut Self {
let mut filter_and = FilterAnd::default();
filter_and.sqls.push(sql.into());
self.sub_filters.push(Box::new(filter_and));
self
}
/// # Examples
///
/// ```
/// use arel::prelude::*;
/// use arel::statements::filter::Filter;
/// #[arel]
/// struct User {}
/// impl Arel for User {}
/// let mut filter = Filter::<User>::new();
/// filter.filter_and_not("username", "sanmu");
/// assert_eq!(filter.to_sql().unwrap().to_sql_string().unwrap(), r#"("user"."username" != ?{"String":"sanmu"})"#);
///
/// filter.filter_and_not("aga", vec![18, 20]);
/// assert_eq!(filter.to_sql().unwrap().to_sql_string().unwrap(), r#"("user"."username" != ?{"String":"sanmu"}) AND ("user"."aga" NOT IN (18,20))"#);
///
/// ```
pub fn filter_and_not<K: AsRef<str>, V: Into<crate::Value>>(&mut self, key: K, value: V) -> &mut Self {
self.filter_and_not_pairs(vec![(key, value)])
}
pub fn filter_and_not_pairs<K: AsRef<str>, V: Into<crate::Value>>(&mut self, pairs: Vec<(K, V)>) -> &mut Self {
let table_name = M::table_name();
let mut filter_and = FilterAnd::default();
for (key, value) in pairs.into_iter() {
let mut sql = crate::Sql::default();
let value: crate::Value = value.into();
match &value {
crate::Value::Array(_) => {
sql.push_str(format!(r#""{}"."{}""#, table_name, key.as_ref()));
if let Some(v_sql) = value.to_sql() {
sql.push_str(" NOT IN ").push_sql(v_sql);
} else {
sql.push_str(" IS NOT NULL");
}
}
_ => {
sql.push_str(format!(r#""{}"."{}""#, table_name, key.as_ref()));
if let Some(v_sql) = value.to_sql() {
sql.push_str(" != ").push_sql(v_sql);
} else {
sql.push_str(" IS NOT NULL");
}
}
}
filter_and.sqls.push(sql);
}
self.sub_filters.push(Box::new(filter_and));
self
}
/// # Examples
///
/// ```
/// use arel::prelude::*;
/// use arel::statements::filter::Filter;
/// #[arel]
/// struct User {}
/// impl Arel for User {}
/// let mut filter = Filter::<User>::new();
/// filter.filter_or("username", "sanmu");
/// assert_eq!(filter.to_sql().unwrap().to_sql_string().unwrap(), r#"("user"."username" = ?{"String":"sanmu"})"#);
///
/// filter.filter_or("age", vec![18, 20]);
/// assert_eq!(filter.to_sql().unwrap().to_sql_string().unwrap(), r#"("user"."username" = ?{"String":"sanmu"}) OR ("user"."age" IN (18,20))"#);
///
/// filter.filter_and("gender", "male");
/// assert_eq!(filter.to_sql().unwrap().to_sql_string().unwrap(), r#"("user"."username" = ?{"String":"sanmu"}) OR ("user"."age" IN (18,20)) AND ("user"."gender" = ?{"String":"male"})"#);
///
/// ```
pub fn filter_or<K: AsRef<str>, V: Into<crate::Value>>(&mut self, key: K, value: V) -> &mut Self {
self.filter_or_pairs(vec![(key, value)])
}
/// # Examples
///
/// ```
/// use arel::prelude::*;
/// use arel::statements::filter::Filter;
/// #[arel]
/// struct User {}
/// impl Arel for User {}
/// let mut filter = Filter::<User>::new();
/// filter.filter_or_pairs(vec![("username", Into::<arel::Value>::into("sanmu")), ("age", Into::<arel::Value>::into(vec![18, 20]))]);
/// assert_eq!(filter.to_sql().unwrap().to_sql_string().unwrap(), r#"("user"."username" = ?{"String":"sanmu"} OR "user"."age" IN (18,20))"#);
///
/// filter.filter_and("gender", "male");
/// assert_eq!(filter.to_sql().unwrap().to_sql_string().unwrap(), r#"("user"."username" = ?{"String":"sanmu"} OR "user"."age" IN (18,20)) AND ("user"."gender" = ?{"String":"male"})"#);
///
/// ```
pub fn filter_or_pairs<K: AsRef<str>, V: Into<crate::Value>>(&mut self, pairs: Vec<(K, V)>) -> &mut Self {
let table_name = M::table_name();
let mut filter_or = FilterOr::default();
for (key, value) in pairs.into_iter() {
let mut sql = crate::Sql::default();
let value: crate::Value = value.into();
match &value {
crate::Value::Array(_) => {
sql.push_str(format!(r#""{}"."{}""#, table_name, key.as_ref()));
if let Some(v_sql) = value.to_sql() {
sql.push_str(" IN ").push_sql(v_sql);
} else {
sql.push_str(" IS NULL");
}
}
_ => {
sql.push_str(format!(r#""{}"."{}""#, table_name, key.as_ref()));
if let Some(v_sql) = value.to_sql() {
sql.push_str(" = ").push_sql(v_sql);
} else {
sql.push_str(" IS NULL");
}
}
}
filter_or.sqls.push(sql);
}
self.sub_filters.push(Box::new(filter_or));
self
}
pub fn filter_or_sql<S: Into<crate::Sql>>(&mut self, sql: S) -> &mut Self {
let mut filter_or = FilterOr::default();
filter_or.sqls.push(sql.into());
self.sub_filters.push(Box::new(filter_or));
self
}
/// # Examples
///
/// ```
/// use arel::prelude::*;
/// use arel::statements::filter::Filter;
/// #[arel]
/// struct User {}
/// impl Arel for User {}
/// let mut filter = Filter::<User>::new();
/// filter.filter_or_not("username", "sanmu");
/// assert_eq!(filter.to_sql().unwrap().to_sql_string().unwrap(), r#"("user"."username" != ?{"String":"sanmu"})"#);
///
/// filter.filter_or_not("aga", vec![18, 20]);
/// assert_eq!(filter.to_sql().unwrap().to_sql_string().unwrap(), r#"("user"."username" != ?{"String":"sanmu"}) OR ("user"."aga" NOT IN (18,20))"#);
///
/// ```
pub fn filter_or_not<K: AsRef<str>, V: Into<crate::Value>>(&mut self, key: K, value: V) -> &mut Self {
self.filter_or_not_pairs(vec![(key, value)])
}
pub fn filter_or_not_pairs<K: AsRef<str>, V: Into<crate::Value>>(&mut self, pairs: Vec<(K, V)>) -> &mut Self {
let table_name = M::table_name();
let mut filter_or = FilterOr::default();
for (key, value) in pairs.into_iter() {
let mut sql = crate::Sql::default();
let value: crate::Value = value.into();
match &value {
crate::Value::Array(_) => {
sql.push_str(format!(r#""{}"."{}""#, table_name, key.as_ref()));
if let Some(v_sql) = value.to_sql() {
sql.push_str(" NOT IN ").push_sql(v_sql);
} else {
sql.push_str(" IS NOT NULL");
}
}
_ => {
sql.push_str(format!(r#""{}"."{}""#, table_name, key.as_ref()));
if let Some(v_sql) = value.to_sql() {
sql.push_str(" != ").push_sql(v_sql);
} else {
sql.push_str(" IS NOT NULL");
}
}
}
filter_or.sqls.push(sql);
}
self.sub_filters.push(Box::new(filter_or));
self
}
pub fn unfilter_starts_with<K: AsRef<str>>(&mut self, start: K) -> &mut Self {
for sub_filter in self.sub_filters.iter_mut() {
if let Some(sqls) = sub_filter.sqls_mut() {
sqls.retain(|sql| !sql.value.starts_with(start.as_ref()));
}
}
self
}
/// # Examples
///
/// ```
/// use arel::prelude::*;
/// use arel::statements::filter::Filter;
/// #[arel]
/// struct User {}
/// impl Arel for User {}
/// let mut filter = Filter::<User>::new();
/// filter.filter_and_pairs(vec![("username", Into::<arel::Value>::into("sanmu")), ("age", Into::<arel::Value>::into(vec![18, 20]))]);
/// filter.unfilter("age");
/// assert_eq!(filter.to_sql().unwrap().to_sql_string().unwrap(), r#"("user"."username" = ?{"String":"sanmu"})"#);
///
/// ```
pub fn unfilter<K: ToString>(&mut self, key: K) -> &mut Self {
let table_name = M::table_name();
let start_string = format!(r#""{}"."{}""#, table_name, key.to_string());
self.unfilter_starts_with(start_string)
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate::prelude::*;
struct User {}
impl SuperArel for User {}
impl Arel for User {}
#[test]
fn it_works() {
let mut filter = Filter::<User>::new();
assert_eq!(filter.to_sql(), None);
let mut filter_and = FilterAnd::default();
filter_and.sqls.push(crate::Sql::new_with_prepares("name = ?", vec!["sanmu"]));
assert_eq!(filter_and.to_sql().unwrap().to_sql_string().unwrap(), r#"name = ?{"String":"sanmu"}"#);
filter_and.sqls.push(crate::Sql::new_with_prepares("age = ?", vec![18]));
assert_eq!(filter_and.to_sql().unwrap().to_sql_string().unwrap(), r#"name = ?{"String":"sanmu"} AND age = ?{"Int":18}"#);
filter.sub_filters.push(Box::new(filter_and));
assert!(filter.to_sql().is_some());
assert_eq!(filter.to_sql().unwrap().to_sql_string().unwrap(), r#"(name = ?{"String":"sanmu"} AND age = ?{"Int":18})"#);
let mut filter_or = FilterOr::default();
filter_or.sqls.push(crate::Sql::new_with_prepares("name = ?", vec!["sanmu"]));
assert_eq!(filter_or.to_sql().unwrap().to_sql_string().unwrap(), r#"name = ?{"String":"sanmu"}"#);
filter_or.sqls.push(crate::Sql::new_with_prepares("age = ?", vec![18]));
assert_eq!(filter_or.to_sql().unwrap().to_sql_string().unwrap(), r#"name = ?{"String":"sanmu"} OR age = ?{"Int":18}"#);
filter.sub_filters.push(Box::new(filter_or));
assert!(filter.to_sql().is_some());
assert_eq!(
filter.to_sql().unwrap().to_sql_string().unwrap(),
r#"(name = ?{"String":"sanmu"} AND age = ?{"Int":18}) OR (name = ?{"String":"sanmu"} OR age = ?{"Int":18})"#
);
// bytes
let mut filter_and = FilterAnd::default();
let bytes_value: crate::Value = bytes::Bytes::from_static(b"hello").into();
filter_and.sqls.push(crate::Sql::new_with_prepares("bytes = ?", vec![bytes_value]));
assert_eq!(filter_and.to_sql().unwrap().to_sql_string().unwrap(), r#"bytes = ?b"hello""#);
// array
let mut filter_and = FilterAnd::default();
let bytes: Vec<crate::Value> = vec![18.into(), 19.into(), 20.into()];
let bytes_value: crate::Value = bytes.into();
filter_and.sqls.push(crate::Sql::new_with_prepares("age IN ?", vec![bytes_value]));
assert_eq!(filter_and.to_sql().unwrap().to_sql_string().unwrap(), r#"age IN ?{"Array":[{"Int":18},{"Int":19},{"Int":20}]}"#);
}
}