/
query.go
331 lines (268 loc) · 6.46 KB
/
query.go
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package database
import (
"database/sql"
"fmt"
"reflect"
"strings"
"github.com/jmoiron/sqlx"
)
type Args map[string]interface{}
func (a *Args) Has(k string) bool {
_, ok := (*a)[k]
return ok
}
func (a *Args) IsTrue(k string) bool {
v, ok := (*a)[k]
if !ok {
return false
}
b, ok := v.(bool)
if !ok {
return false
}
return b
}
func GetFilter(filters []map[string]interface{}) (filter Args) {
if len(filters) > 0 {
filter = filters[0]
}
return
}
func PrepareWhere(w []string) string {
if len(w) == 0 {
return ""
}
return " WHERE " + strings.Join(w, " AND ")
}
func PrepareIN(n int) string {
return strings.Repeat("?, ", n-1) + "?"
}
func PrepareIntIN(args *[]interface{}, w *[]string, value interface{}, table, field string) error {
switch v := value.(type) {
case []int:
if len(v) == 0 {
break
}
inPart := PrepareIN(len(v))
*w = append(*w, fmt.Sprintf("%s.%s IN (%s)", table, field, inPart))
*args = append(*args, intToIface(v)...)
case int:
*args = append(*args, v)
*w = append(*w, fmt.Sprintf("%s.%s = ?", table, field))
default:
err := fmt.Errorf("expected %s type int or []int, got %T", field, v)
return err
}
return nil
}
func Scalar(conn Conn, query string, args ...interface{}) (int64, error) {
row, err := QueryRowx(conn, query, args...)
if err != nil {
return 0, err
}
var value int64
err = row.Scan(&value)
return value, err
}
func Prepare(conn Conn, query string) (*sqlx.Stmt, error) {
switch c := conn.(type) {
case *sqlx.Tx:
return c.Preparex(query)
case *DB:
return c.stmtCache.get(conn, query)
default:
return c.Preparex(query)
}
}
func StmtClose(conn Conn, stmt *sqlx.Stmt) error {
if stmt == nil {
return nil
}
switch conn.(type) {
case *DB:
return nil
default:
return stmt.Close()
}
}
func Exec(conn Conn, query string, args ...interface{}) (sql.Result, error) {
return conn.Exec(query, args...)
// if stmt, err := Prepare(conn, query); err != nil {
// return nil, err
// } else {
// defer StmtClose(conn, stmt)
// return stmt.Exec(args...)
// }
}
func Queryx(conn Conn, query string, args ...interface{}) (*sqlx.Rows, error) {
return conn.Queryx(query, args...)
//if stmt, err := Prepare(conn, query); err != nil {
// return nil, err
//} else {
// defer StmtClose(conn, stmt)
// return stmt.Queryx(args...)
//}
}
func QueryRowx(conn Conn, query string, args ...interface{}) (*sqlx.Row, error) {
return conn.QueryRowx(query, args...), nil
//stmt, err := Prepare(conn, query)
//defer StmtClose(conn, stmt)
//if err != nil {
// fmt.Println("ERR", err)
// return nil, err
//} else {
// return stmt.QueryRowx(args...), nil
//}
}
func Select(exec Conn, dest interface{}, query string, args ...interface{}) error {
return querySelect(DefaultDBMap, exec, dest, query, args...)
}
func Put(exec Conn, isNew bool, list ...interface{}) error {
if isNew {
return Insert(exec, list...)
}
_, err := Update(exec, list...)
return err
}
func Update(exec Conn, list ...interface{}) (int64, error) {
return queryUpdate(DefaultDBMap, exec, list...)
}
func Insert(exec Conn, list ...interface{}) error {
return queryInsert(DefaultDBMap, exec, list...)
}
func Delete(exec Conn, list ...interface{}) (int64, error) {
return queryDelete(DefaultDBMap, exec, list...)
}
func querySelect(m *DbMap, exec Conn, dest interface{}, query string, args ...interface{}) error {
t := reflect.TypeOf(dest)
if t.Kind() == reflect.Ptr {
t = t.Elem()
} else {
return fmt.Errorf("select dest must be a pointer, but got: %t", dest)
}
//stmt, err := Prepare(exec, query)
//defer StmtClose(exec, stmt)
//if err != nil {
// return err
//}
switch t.Kind() {
case reflect.Struct:
//row := stmt.QueryRowx(args...)
row := exec.QueryRowx(query, args...)
return row.StructScan(dest)
case reflect.Slice:
//sqlrows, err := stmt.Query(args...)
sqlrows, err := exec.Query(query, args...)
if err != nil {
return err
}
defer sqlrows.Close()
return sqlx.StructScan(sqlrows, dest)
default:
return fmt.Errorf("select dest must be a pointer to a slice or struct, but got: %t", dest)
}
}
func queryDelete(m *DbMap, exec Conn, list ...interface{}) (int64, error) {
var err error
var table *TableMap
var elem reflect.Value
var count int64
for _, ptr := range list {
table, elem, err = tableForPointer(m, ptr, true)
if err != nil {
return -1, err
}
bi := table.bindDelete(elem)
//stmt, err := Prepare(exec, bi.query)
//defer StmtClose(exec, stmt)
//
//f err != nil {
// return -1, err
//}
//res, err := stmt.Exec(bi.args...)
res, err := exec.Exec(bi.query, bi.args...)
if err != nil {
return -1, err
}
rows, err := res.RowsAffected()
if err != nil {
return -1, err
}
count += rows
}
return count, nil
}
func queryUpdate(m *DbMap, exec Conn, list ...interface{}) (int64, error) {
var err error
var table *TableMap
var elem reflect.Value
var count int64
for _, ptr := range list {
table, elem, err = tableForPointer(m, ptr, true)
if err != nil {
return -1, err
}
bi := table.bindUpdate(elem)
if err != nil {
return -1, err
}
// stmt, err := Prepare(exec, bi.query)
// defer StmtClose(exec, stmt)
// if err != nil {
// return -1, err
// }
// res, err := stmt.Exec(bi.args...)
res, err := exec.Exec(bi.query, bi.args...)
if err != nil {
return -1, err
}
rows, err := res.RowsAffected()
if err != nil {
return -1, err
}
count += rows
}
return count, nil
}
func queryInsert(m *DbMap, exec Conn, list ...interface{}) error {
var err error
var table *TableMap
var elem reflect.Value
for _, ptr := range list {
table, elem, err = tableForPointer(m, ptr, false)
if err != nil {
return err
}
bi := table.bindInsert(elem)
//stmt, err := Prepare(exec, bi.query)
//defer StmtClose(exec, stmt)
//if err != nil {
// return err
//}
if bi.autoIncrIdx > -1 {
//res, err := stmt.Exec(bi.args...)
res, err := exec.Exec(bi.query, bi.args...)
if err != nil {
return err
}
id, err := res.LastInsertId()
if err != nil {
return err
}
f := elem.Field(bi.autoIncrIdx)
k := f.Kind()
if (k == reflect.Int) || (k == reflect.Int16) || (k == reflect.Int32) || (k == reflect.Int64) {
f.SetInt(id)
} else {
return fmt.Errorf("Cannot set autoincrement value on non-Int field. SQL=%s autoIncrIdx=%d", bi.query, bi.autoIncrIdx)
}
} else {
//_, err := stmt.Exec(bi.args...)
_, err := exec.Exec(bi.query, bi.args...)
if err != nil {
return err
}
}
}
return nil
}