Struct jrdb::Database

pub struct Database { /* fields omitted */ }

Implementations

impl Database

pub fn from(s: &str) -> Database

Choose a database to open, will create if doesn't exist.

Examples

use jrdb::Database;
 
fn main() {
  //create "main.db" if file not exist
  let db:Database = Database::from("main");
}

pub fn execute(&mut self) -> JrCollection

Execute the query

Examples

use jrdb::Database;
use jrdb::jrdb_type::JrDocument;
 
fn main() {
  let db:Database = Database::from("main");
 
  //create JrDocument
  let mut doc = JrDocument::new();
  doc.add_value("name", String::from("Joel"));
  doc.add_value("pass", String::from("ILoveErd"));
  doc.add_value("age", 30);
 
  //create collection "users" if not exist
  db.insert("users", doc).execute();
}

pub fn insert(&mut self, from: &str, doc: JrDocument) -> &mut Self

Insert data into collection by provide a JrDocument and collection name. Collection will be created if not exist.

Examples

use jrdb::Database;
use jrdb::jrdb_type::JrDocument;
 
fn main() {
  let db:Database = Database::from("main");
 
  //create JrDocument
  let mut doc = JrDocument::new();
  doc.add_value("name", String::from("Joel"));
  doc.add_value("pass", String::from("ILoveErd"));
  doc.add_value("age", 30);
 
  //create collection "users" if not exist
  db.insert("users", doc).execute();
}

pub fn select(&mut self, from: &str) -> &mut Self

Select data from database

Examples

use jrdb::Database;
use jrdb::jrdb_type::{ AddGetValue, JrCollection, JrDocument };
 
fn main(){
  let db:Database = Database::from("main");
 
  //create JrDocument
  let mut doc = JrDocument::new();
  doc.add_value("name", String::from("Joel"));
  doc.add_value("pass", String::from("ILoveErd"));
  doc.add_value("age", 30);
 
  //create collection "users" if not exist
  db.insert("users", doc).execute();
   
  //select all data from colection "users"
  let collection: JrCollection = db.select("users").execute();
  collection.print(0);
}

pub fn update(&mut self, from: &str, doc: JrDocument) -> &mut Self

Update data from database

Examples

use jrdb::Database;
use jrdb::jrdb_type::{ AddGetValue, JrCollection, JrDocument };
 
fn main(){
  let db:Database = Database::from("main");
 
  //create JrDocument
  let mut doc = JrDocument::new();
  doc.add_value("name", String::from("Joel"));
  doc.add_value("pass", String::from("ILoveErd"));
  doc.add_value("age", 30);
 
  //create collection "users" if not exist
  db.insert("users", doc).execute();
   
  //select all data from collection "users"
  let collection: JrCollection = db.select("users").execute();
  collection.print(0);
 
  //create JrDocument for update
  let mut updated_doc = JrDocument::new();
  updated_doc.add_value("name", String::from("Mathew"));
 
  //update all data from collection "users"
  db.update("users", updated_doc).execute();
 
  let collection: JrCollection = db.select("users").execute();
  collection.print(0);
}

pub fn delete(&mut self, from: &str) -> &mut Self

Delete data from database

Examples

use jrdb::Database;
use jrdb::jrdb_type::{ AddGetValue, JrCollection, JrDocument };
 
fn main(){
  let db:Database = Database::from("main");
 
  //create JrDocument
  let mut doc = JrDocument::new();
  doc.add_value("name", String::from("Joel"));
  doc.add_value("pass", String::from("ILoveErd"));
  doc.add_value("age", 30);
 
  //create collection "users" if not exist
  db.insert("users", doc).execute();
   
  //select all data from collection "users"
  let collection: JrCollection = db.select("users").execute();
  collection.print(0);

  //delete all data from collection "users"
  db.delete("users").execute();
 
  let collection: JrCollection = db.select("users").execute();
  collection.print(0);
}

pub fn condition(&mut self, cond: JrCondition) -> &mut Self

Apply condition while select, delete or update the database

Examples

use jrdb::Database;
use jrdb::jrdb_type::{ AddGetValue, JrCollection, JrDocument };
use jrdb::exp;
 
fn main(){
  let db:Database = Database::from("main");
 
  //create JrDocument
  let mut doc = JrDocument::new();
  doc.add_value("name", String::from("Joel"));
  doc.add_value("pass", String::from("ILoveErd"));
  doc.add_value("age", 30);
 
  //create collection "users" if not exist
  db.insert("users", doc).execute();
   
  //select all data from collection "users"
  let collection: JrCollection = 
    db.select("users")
    .condition(exp! {"name" ;== "'Mathew'"})
    .execute();
   
  //nothing will show since no document with in 'users' with name 'Manthew'
  collection.print(0);
 
  //select all data from collection "users"
  let collection: JrCollection = 
    db.select("users")
    .condition(exp! {"name" ;== "'Joel'"})
    .execute();
   
  //shows document with name 'Joel'
  collection.print(0);
}