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DB Migrations (#67)

This commit is contained in:
konrad
2019-03-29 17:54:35 +00:00
committed by Gitea
parent e21471a193
commit be5a17e993
127 changed files with 7917 additions and 1456 deletions

View File

@ -1,26 +1,47 @@
# SQL builder
[![CircleCI](https://circleci.com/gh/go-xorm/builder/tree/master.svg?style=svg)](https://circleci.com/gh/go-xorm/builder/tree/master)
[![GitCI.cn](https://gitci.cn/api/badges/go-xorm/builder/status.svg)](https://gitci.cn/go-xorm/builder) [![codecov](https://codecov.io/gh/go-xorm/builder/branch/master/graph/badge.svg)](https://codecov.io/gh/go-xorm/builder)
[![](https://goreportcard.com/badge/github.com/go-xorm/builder)](https://goreportcard.com/report/github.com/go-xorm/builder)
Package builder is a lightweight and fast SQL builder for Go and XORM.
Make sure you have installed Go 1.1+ and then:
Make sure you have installed Go 1.8+ and then:
go get github.com/go-xorm/builder
# Insert
```Go
sql, args, err := Insert(Eq{"c": 1, "d": 2}).Into("table1").ToSQL()
sql, args, err := builder.Insert(Eq{"c": 1, "d": 2}).Into("table1").ToSQL()
// INSERT INTO table1 SELECT * FROM table2
sql, err := builder.Insert().Into("table1").Select().From("table2").ToBoundSQL()
// INSERT INTO table1 (a, b) SELECT b, c FROM table2
sql, err = builder.Insert("a, b").Into("table1").Select("b, c").From("table2").ToBoundSQL()
```
# Select
```Go
// Simple Query
sql, args, err := Select("c, d").From("table1").Where(Eq{"a": 1}).ToSQL()
// With join
sql, args, err = Select("c, d").From("table1").LeftJoin("table2", Eq{"table1.id": 1}.And(Lt{"table2.id": 3})).
RightJoin("table3", "table2.id = table3.tid").Where(Eq{"a": 1}).ToSQL()
// From sub query
sql, args, err := Select("sub.id").From(Select("c").From("table1").Where(Eq{"a": 1}), "sub").Where(Eq{"b": 1}).ToSQL()
// From union query
sql, args, err = Select("sub.id").From(
Select("id").From("table1").Where(Eq{"a": 1}).Union("all", Select("id").From("table1").Where(Eq{"a": 2})),"sub").
Where(Eq{"b": 1}).ToSQL()
// With order by
sql, args, err = Select("a", "b", "c").From("table1").Where(Eq{"f1": "v1", "f2": "v2"}).
OrderBy("a ASC").ToSQL()
// With limit.
// Be careful! You should set up specific dialect for builder before performing a query with LIMIT
sql, args, err = Dialect(MYSQL).Select("a", "b", "c").From("table1").OrderBy("a ASC").
Limit(5, 10).ToSQL()
```
# Update
@ -35,6 +56,16 @@ sql, args, err := Update(Eq{"a": 2}).From("table1").Where(Eq{"a": 1}).ToSQL()
sql, args, err := Delete(Eq{"a": 1}).From("table1").ToSQL()
```
# Union
```Go
sql, args, err := Select("*").From("a").Where(Eq{"status": "1"}).
Union("all", Select("*").From("a").Where(Eq{"status": "2"})).
Union("distinct", Select("*").From("a").Where(Eq{"status": "3"})).
Union("", Select("*").From("a").Where(Eq{"status": "4"})).
ToSQL()
```
# Conditions
* `Eq` is a redefine of a map, you can give one or more conditions to `Eq`