mirror of
https://gitee.com/johng/gf.git
synced 2024-12-06 06:08:38 +08:00
326 lines
9.0 KiB
Go
326 lines
9.0 KiB
Go
// Copyright 2017 gf Author(https://gitee.com/johng/gf). All Rights Reserved.
|
||
//
|
||
// This Source Code Form is subject to the terms of the MIT License.
|
||
// If a copy of the MIT was not distributed with this file,
|
||
// You can obtain one at https://gitee.com/johng/gf.
|
||
|
||
package gdb
|
||
|
||
import (
|
||
"fmt"
|
||
"errors"
|
||
"database/sql"
|
||
"gitee.com/johng/gf/g/util/gconv"
|
||
_ "github.com/go-sql-driver/mysql"
|
||
)
|
||
|
||
// 数据库链式操作模型对象
|
||
type Model struct {
|
||
tx *Tx // 数据库事务对象
|
||
db *Db // 数据库操作对象
|
||
tables string // 数据库操作表
|
||
fields string // 操作字段
|
||
where string // 操作条件
|
||
whereArgs []interface{} // 操作条件参数
|
||
groupBy string // 分组语句
|
||
orderBy string // 排序语句
|
||
start int // 分页开始
|
||
limit int // 分页条数
|
||
data interface{} // 操作记录(支持Map/List/string类型)
|
||
batch int // 批量操作条数
|
||
}
|
||
|
||
// 链式操作,数据表字段,可支持多个表,以半角逗号连接
|
||
func (db *Db) Table(tables string) (*Model) {
|
||
return &Model {
|
||
db : db,
|
||
tables : tables,
|
||
fields : "*",
|
||
}
|
||
}
|
||
|
||
// 链式操作,数据表字段,可支持多个表,以半角逗号连接
|
||
func (db *Db) From(tables string) (*Model) {
|
||
return db.Table(tables)
|
||
}
|
||
|
||
// (事务)链式操作,数据表字段,可支持多个表,以半角逗号连接
|
||
func (tx *Tx) Table(tables string) (*Model) {
|
||
return &Model {
|
||
tx : tx,
|
||
tables : tables,
|
||
}
|
||
}
|
||
|
||
// (事务)链式操作,数据表字段,可支持多个表,以半角逗号连接
|
||
func (tx *Tx) From(tables string) (*Model) {
|
||
return tx.Table(tables)
|
||
}
|
||
|
||
// 链式操作,左联表
|
||
func (md *Model) LeftJoin(joinTable string, on string) (*Model) {
|
||
md.tables += fmt.Sprintf(" LEFT JOIN %s ON (%s)", joinTable, on)
|
||
return md
|
||
}
|
||
|
||
// 链式操作,右联表
|
||
func (md *Model) RightJoin(joinTable string, on string) (*Model) {
|
||
md.tables += fmt.Sprintf(" RIGHT JOIN %s ON (%s)", joinTable, on)
|
||
return md
|
||
}
|
||
|
||
// 链式操作,内联表
|
||
func (md *Model) InnerJoin(joinTable string, on string) (*Model) {
|
||
md.tables += fmt.Sprintf(" INNER JOIN %s ON (%s)", joinTable, on)
|
||
return md
|
||
}
|
||
|
||
// 链式操作,查询字段
|
||
func (md *Model) Fields(fields string) (*Model) {
|
||
md.fields = fields
|
||
return md
|
||
}
|
||
|
||
// 链式操作,condition,支持string & gdb.Map
|
||
func (md *Model) Where(where interface{}, args...interface{}) (*Model) {
|
||
md.where = md.db.formatCondition(where)
|
||
md.whereArgs = args
|
||
return md
|
||
}
|
||
|
||
// 链式操作,添加AND条件到Where中
|
||
func (md *Model) And(where interface{}, args...interface{}) (*Model) {
|
||
md.where += " AND " + md.db.formatCondition(where)
|
||
md.whereArgs = append(md.whereArgs, args)
|
||
return md
|
||
}
|
||
|
||
// 链式操作,添加OR条件到Where中
|
||
func (md *Model) Or(where interface{}, args...interface{}) (*Model) {
|
||
md.where += " OR " + md.db.formatCondition(where)
|
||
md.whereArgs = append(md.whereArgs, args)
|
||
return md
|
||
}
|
||
|
||
// 链式操作,group by
|
||
func (md *Model) GroupBy(groupBy string) (*Model) {
|
||
md.groupBy = groupBy
|
||
return md
|
||
}
|
||
|
||
// 链式操作,order by
|
||
func (md *Model) OrderBy(orderBy string) (*Model) {
|
||
md.orderBy = orderBy
|
||
return md
|
||
}
|
||
|
||
// 链式操作,limit
|
||
func (md *Model) Limit(start int, limit int) (*Model) {
|
||
md.start = start
|
||
md.limit = limit
|
||
return md
|
||
}
|
||
|
||
// 链式操作,操作数据记录项,可以是string/Map, 也可以是:key,value,key,value,...
|
||
func (md *Model) Data(data...interface{}) (*Model) {
|
||
if len(data) > 1 {
|
||
m := make(map[string]interface{})
|
||
for i := 0; i < len(data); i += 2 {
|
||
m[gconv.String(data[i])] = data[i + 1]
|
||
}
|
||
md.data = m
|
||
} else {
|
||
md.data = data[0]
|
||
}
|
||
return md
|
||
}
|
||
|
||
// 链式操作, CURD - Insert/BatchInsert
|
||
func (md *Model) Insert() (sql.Result, error) {
|
||
// 批量操作
|
||
if list, ok := md.data.(List); ok {
|
||
batch := 10
|
||
if md.batch > 0 {
|
||
batch = md.batch
|
||
}
|
||
if md.tx == nil {
|
||
return md.db.BatchInsert(md.tables, list, batch)
|
||
} else {
|
||
return md.tx.BatchInsert(md.tables, list, batch)
|
||
}
|
||
}
|
||
// 记录操作
|
||
if md.data == nil {
|
||
return nil, errors.New("inserting into table with empty data")
|
||
}
|
||
if dataMap, ok := md.data.(Map); ok {
|
||
if md.tx == nil {
|
||
return md.db.Insert(md.tables, dataMap)
|
||
} else {
|
||
return md.tx.Insert(md.tables, dataMap)
|
||
}
|
||
}
|
||
return nil, errors.New("inserting into table with invalid data type")
|
||
}
|
||
|
||
// 链式操作, CURD - Replace/BatchReplace
|
||
func (md *Model) Replace() (sql.Result, error) {
|
||
// 批量操作
|
||
if list, ok := md.data.(List); ok {
|
||
batch := 10
|
||
if md.batch > 0 {
|
||
batch = md.batch
|
||
}
|
||
if md.tx == nil {
|
||
return md.db.BatchReplace(md.tables, list, batch)
|
||
} else {
|
||
return md.tx.BatchReplace(md.tables, list, batch)
|
||
}
|
||
}
|
||
// 记录操作
|
||
if md.data == nil {
|
||
return nil, errors.New("replacing into table with empty data")
|
||
}
|
||
if dataMap, ok := md.data.(Map); ok {
|
||
if md.tx == nil {
|
||
return md.db.Insert(md.tables, dataMap)
|
||
} else {
|
||
return md.tx.Insert(md.tables, dataMap)
|
||
}
|
||
}
|
||
return nil, errors.New("replacing into table with invalid data type")
|
||
}
|
||
|
||
// 链式操作, CURD - Save/BatchSave
|
||
func (md *Model) Save() (sql.Result, error) {
|
||
// 批量操作
|
||
if list, ok := md.data.(List); ok {
|
||
batch := 10
|
||
if md.batch > 0 {
|
||
batch = md.batch
|
||
}
|
||
if md.tx == nil {
|
||
return md.db.BatchSave(md.tables, list, batch)
|
||
} else {
|
||
return md.tx.BatchSave(md.tables, list, batch)
|
||
}
|
||
}
|
||
// 记录操作
|
||
if md.data == nil {
|
||
return nil, errors.New("saving into table with empty data")
|
||
}
|
||
if dataMap, ok := md.data.(Map); ok {
|
||
if md.tx == nil {
|
||
return md.db.Save(md.tables, dataMap)
|
||
} else {
|
||
return md.tx.Save(md.tables, dataMap)
|
||
}
|
||
}
|
||
return nil, errors.New("saving into table with invalid data type")
|
||
}
|
||
|
||
// 链式操作, CURD - Update
|
||
func (md *Model) Update() (sql.Result, error) {
|
||
if md.data == nil {
|
||
return nil, errors.New("updating table with empty data")
|
||
}
|
||
if md.tx == nil {
|
||
return md.db.Update(md.tables, md.data, md.where, md.whereArgs ...)
|
||
} else {
|
||
return md.tx.Update(md.tables, md.data, md.where, md.whereArgs ...)
|
||
}
|
||
}
|
||
|
||
// 链式操作, CURD - Delete
|
||
func (md *Model) Delete() (sql.Result, error) {
|
||
if md.where == "" {
|
||
return nil, errors.New("where is required while deleting")
|
||
}
|
||
if md.tx == nil {
|
||
return md.db.Delete(md.tables, md.where, md.whereArgs...)
|
||
} else {
|
||
return md.tx.Delete(md.tables, md.where, md.whereArgs...)
|
||
}
|
||
}
|
||
|
||
// 设置批处理的大小
|
||
func (md *Model) Batch(batch int) *Model {
|
||
md.batch = batch
|
||
return md
|
||
}
|
||
|
||
// 链式操作,select
|
||
func (md *Model) Select() (List, error) {
|
||
if md.tx == nil {
|
||
return md.db.GetAll(md.getFormattedSql(), md.whereArgs...)
|
||
} else {
|
||
return md.tx.GetAll(md.getFormattedSql(), md.whereArgs...)
|
||
}
|
||
}
|
||
|
||
// 链式操作,查询所有记录
|
||
func (md *Model) All() (List, error) {
|
||
return md.Select()
|
||
}
|
||
|
||
// 链式操作,查询单条记录
|
||
func (md *Model) One() (Map, error) {
|
||
list, err := md.All()
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
if len(list) > 0 {
|
||
return list[0], nil
|
||
}
|
||
return nil, nil
|
||
}
|
||
|
||
// 链式操作,查询字段值
|
||
func (md *Model) Value() (interface{}, error) {
|
||
one, err := md.One()
|
||
if err != nil {
|
||
return "", err
|
||
}
|
||
for _, v := range one {
|
||
return v, nil
|
||
}
|
||
return "", nil
|
||
}
|
||
|
||
// 链式操作,查询数量,fields可以为空,也可以自定义查询字段,
|
||
// 当给定自定义查询字段时,该字段必须为数量结果,否则会引起歧义,如:Fields("COUNT(id)")
|
||
func (md *Model) Count() (int, error) {
|
||
if md.fields == "" || md.fields == "*" {
|
||
md.fields = "COUNT(1)"
|
||
}
|
||
s := md.getFormattedSql()
|
||
if len(md.groupBy) > 0 {
|
||
s = fmt.Sprintf("SELECT COUNT(1) FROM (%s) count_alias", s)
|
||
}
|
||
if md.tx == nil {
|
||
return md.db.GetCount(s, md.whereArgs...)
|
||
} else {
|
||
return md.tx.GetCount(s, md.whereArgs...)
|
||
}
|
||
}
|
||
|
||
// 格式化当前输入参数,返回可执行的SQL语句(不带参数)
|
||
func (md *Model) getFormattedSql() string {
|
||
if md.fields == "" {
|
||
md.fields = "*"
|
||
}
|
||
s := fmt.Sprintf("SELECT %s FROM %s", md.fields, md.tables)
|
||
if md.where != "" {
|
||
s += " WHERE " + md.where
|
||
}
|
||
if md.groupBy != "" {
|
||
s += " GROUP BY " + md.groupBy
|
||
}
|
||
if md.orderBy != "" {
|
||
s += " ORDER BY " + md.orderBy
|
||
}
|
||
if md.limit != 0 {
|
||
s += fmt.Sprintf(" LIMIT %d, %d", md.start, md.limit)
|
||
}
|
||
return s
|
||
} |