A PostgreSQL support for node.js, based on node-postgres and used Pool.
npm i postgre-sql
const {connect} = require('postgre-sql');
connect({user:'postgres',database:'test',max:2,idleTimeoutMillis:100});const {client} = require('postgre-sql');
let db = new client();
(async ()=>{
try{
let res = await db.table('public.users')
.where({vip:true},"create_at>'2017-01-01' and coordinate <-> point(116,39) < 1")
.field('uid,user_name').order('uid desc').page(2).select();
// res -> [{uid:34,use_name:'alice'},{uid:35,user_name:'💘'}...]
}catch (e){
// something else
}
try{
await db.begin();
let new_uid = await db.table('public.users').add({user_name:'charles'});
await db.commit();
}catch (e){
db.rollback();
}
})();默认是statement模式，这个模式的语句会平均负载到池中所有的连接。适合并行查询！
会话模式会根据业务自动调整。
const {client} = require('postgre-sql');
let db = new client();
(async ()=>{
try{
let res = await db.table('public.users')
.where({vip:true},"create_at>'2017-01-01' and coordinate <-> point(116,39) < 1")
.field('uid,user_name').order('uid desc').page(2).select();
// res -> [{uid:34,use_name:'alice'},{uid:35,user_name:'💘'}...]
}catch (e){
// something else
}
})();const {client} = require('postgre-sql');
let db = new client();
(async ()=>{
try{
await db.connect();
let res = await db.table('public.users')
.where({vip:true},"create_at>'2017-01-01' and coordinate <-> point(116,39) < 1")
.field('uid,user_name').order('uid desc').page(2).select();
// res -> [{uid:34,use_name:'alice'},{uid:35,user_name:'💘'}...]
await db.release(); // Attention! if connection a session don't forget release it!
}catch (e){
await db.release(); // Attention! if connection a session don't forget release it!
// something else
}
})();const {client} = require('postgre-sql');
let db = new client();
(async ()=>{
try{
await db.begin();
let new_uid = await db.table('public.users').add({user_name:'charles'});
await db.commit(); // Attention! if start a transaction don't forget finish it!
}catch (e){
db.rollback(); // Attention! if start a transaction don't forget finish it!
}
})();如果表中有create_at、update_at、delete_at。在CUD的操作中会自动填充NOW()。
软删除只在db.table(tableName).where(conditions).delete();时影响结果。
在SELECT类型的语句中，不会主动识，别并剔除delete_at非空的记录。需要手动写在conditions中。
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