forked from server-nado/orm
/
params.go
344 lines (302 loc) · 6.96 KB
/
params.go
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package orm
import (
"database/sql"
"fmt"
"strings"
)
var NULL_LIMIT = [2]int{0, 0}
var databases = map[string]*Database{}
var OpenSyncUpdate = false
var OpenSyncDelete = false
var SqlSyncHook = make(chan string, 1000)
//读写数据库名称
var readDbConnectName, writeDbConnectName string = "default", "default"
// 读数据库名称 默认default
func SetReadConnectName(name string) {
readDbConnectName = name
}
// 写数据库名称 默认default
func SetWriteConnectName(name string) {
writeDbConnectName = name
}
type Database struct {
*sql.DB
Name string
DriverName string
DataSourceName string
}
func (self *Database) Conn() (err error) {
self.DB, err = sql.Open(self.DriverName, self.DataSourceName)
return
}
func NewDatabase(name, driverName, dataSourceName string) (database *Database, err error) {
var ok bool
if database, ok = databases[name]; !ok {
database = new(Database)
database.Name = name
database.DriverName = driverName
database.DataSourceName = dataSourceName
databases[name] = database
err = database.Conn()
} else {
err = database.Ping()
}
return
}
type ParmaField struct {
name string
val interface{}
}
type ParamsInterface interface {
GetOrLen() int
GetWhereLen() int
GetSetLen() int
GetOr() []ParmaField
GetWhere() []ParmaField
GetSet() []ParmaField
GetFields() []string
GetOrder() []string
GetLimit() [2]int
GetTableName() string
}
/**
传参解析
**/
type Params struct {
connname string
tbname string
where []ParmaField
or []ParmaField
set []ParmaField
fields []string
order []string
limit [2]int
insertsql string
hasRow bool
}
func (self Params) GetWhereLen() int {
return len(self.where)
}
func (self Params) GetOrLen() int {
return len(self.or)
}
func (self Params) GetSetLen() int {
return len(self.set)
}
func (self Params) GetWhere() []ParmaField {
return self.where
}
func (self Params) GetOr() []ParmaField {
return self.or
}
func (self Params) GetSet() []ParmaField {
return self.set
}
func (self Params) GetFields() []string {
return self.fields
}
func (self Params) GetOrder() []string {
return self.order
}
func (self Params) GetLimit() [2]int {
return self.limit
}
func (self *Params) Init() {
self.connname = ""
self.hasRow = false
self.where = self.where[len(self.where):]
self.or = self.or[len(self.or):]
self.set = self.set[len(self.set):]
self.fields = self.fields[len(self.fields):]
self.order = self.order[len(self.order):]
}
func (self *Params) SetTable(tbname string) {
self.tbname = tbname
}
func (self *Params) SetField(fields ...string) {
self.fields = fields
}
func (self *Params) Filter(name string, val interface{}) *Params {
self.where = append(self.where, ParmaField{name, val})
return self
}
func (self *Params) FilterOr(name string, val interface{}) *Params {
self.or = append(self.or, ParmaField{name, val})
return self
}
// 添加修改
func (self *Params) Change(name string, val interface{}) {
self.set = append(self.set, ParmaField{name, val})
}
func (self *Params) Limit(page, step int) *Params {
self.limit[0] = page
self.limit[1] = step
return self
}
func (self *Params) Db(name string) *Params {
self.connname = name
return self
}
func (self *Params) getReadConnect() (*Database, ModuleToSql) {
db_connect_name := readDbConnectName
if self.connname != "" {
db_connect_name = self.connname
}
if db, ok := databases[db_connect_name]; ok {
return db, driversql[db.DriverName](*self)
} else {
panic("database name '" + db_connect_name + "' not exists!")
}
}
func (self *Params) getWriteConnect() (*Database, ModuleToSql) {
db_connect_name := writeDbConnectName
if self.connname != "" {
db_connect_name = self.connname
}
if db, ok := databases[db_connect_name]; ok {
return db, driversql[db.DriverName](*self)
} else {
panic("database name '" + db_connect_name + "' not exists!")
}
}
func (self *Params) All() (rows *sql.Rows, err error) {
//rows, err = self.db.Query(self.execSelect())
// self.stmt, err = self.db.Prepare()
db, query := self.getReadConnect()
sqls, val := query.Select()
if debug_sql {
Debug.Println("select all ", sqls, val)
}
rows, err = db.Query(sqls, val...)
if err != nil {
Error.Println(err)
}
return
}
func (self *Params) One(vals ...interface{}) error {
//rows, err = self.db.Query(self.execSelect())
// self.stmt, err = self.db.Prepare()
db, query := self.getReadConnect()
sqls, val := query.Select()
err := db.QueryRow(sqls, val...).Scan(vals...)
if debug_sql {
Debug.Println("select One ", sqls, val, err)
// Debug.Output(3, "callback1")
// Debug.Output(4, "callback2")
// Debug.Output(5, "callback3")
}
switch {
case err == sql.ErrNoRows:
return err
case err != nil:
return err
default:
self.hasRow = true
return nil
}
}
func (self *Params) Delete() (res sql.Result, err error) {
db, query := self.getWriteConnect()
sqls, val := query.Delete()
if debug_sql {
Debug.Println("delete ", sqls, val)
}
if OpenSyncDelete {
sqls = strings.Replace(sqls, "?", "%v", -1)
sqls = fmt.Sprintf(sqls, val...)
SqlSyncHook <- sqls
return nil, nil
} else {
var stmt *sql.Stmt
stmt, err = db.Prepare(sqls)
if err == nil {
defer stmt.Close()
} else {
Error.Println(err)
return
}
res, err = stmt.Exec(val...)
if err != nil {
Error.Println(err)
}
}
return
}
func (self *Params) Count() (int64, error) {
db, query := self.getReadConnect()
sqls, val := query.Count()
if debug_sql {
Debug.Println("count ", sqls, val)
}
row := db.QueryRow(sqls, val...)
var c int64
if err := row.Scan(&c); err == nil {
return c, nil
} else {
return 0, err
}
return 0, nil
}
func (self *Params) Save() (bool, int64, error) {
db, query := self.getWriteConnect()
defer func() {
self.set = self.set[len(self.set):]
}()
var err error
var stmt *sql.Stmt
var res sql.Result
//var n int64
//if n , err= self.Count();err == nil && n >0
if self.hasRow {
sqls, val := query.Update()
if OpenSyncUpdate {
sqls = strings.Replace(sqls, "?", "%v", -1)
sqls = fmt.Sprintf(sqls, val...)
SqlSyncHook <- sqls
return false, 0, nil
} else {
if debug_sql {
Debug.Println("save update ", sqls, val)
}
stmt, err = db.Prepare(sqls)
if err == nil {
defer stmt.Close()
} else {
return false, 0, err
}
res, err = stmt.Exec(val...)
if err != nil {
return false, 0, err
}
a, b := res.RowsAffected()
return false, a, b
}
} else {
sqls, val := query.Insert()
if debug_sql {
Debug.Println("save insert ", sqls, val)
}
stmt, err = db.Prepare(sqls)
if err == nil {
defer stmt.Close()
} else {
return false, 0, err
}
res, err = stmt.Exec(val...)
if err != nil {
return true, 0, err
}
a, b := res.LastInsertId()
self.hasRow = true
return true, a, b
}
}
func (self Params) GetTableName() string {
tbname := ""
if tb := strings.Split(self.tbname, "."); len(tb) > 1 {
tbname = fmt.Sprintf("`%s`.`%s`", tb[0], tb[1])
} else {
tbname = "`" + self.tbname + "`"
}
return tbname
}