first fix

crud.go

@@ -0,0 +1,216 @@
+package db
+
+import "fmt"
+
+func (db DB) Insert(obj interface{}) error {
+	tx := db.orm.Begin()
+
+	err := tx.Create(obj).Error
+	if err != nil {
+		tx.Rollback()
+		return err
+	}
+
+	err = tx.Commit().Error
+	if err != nil {
+		tx.Rollback()
+		return err
+	}
+	return nil
+}
+func (db DB) Get(objs interface{}, where map[string]interface{}, order string, limit uint64, offset uint64, deleted bool) error {
+	con := db.orm
+	if deleted {
+		con = con.Unscoped()
+	}
+
+	keys, values := whereExactKeyValues(where)
+	con = con.Where(keys, values)
+	if deleted {
+		con = con.Where("deleted_at is not null")
+	}
+
+	if order != "" {
+		con = con.Order(order)
+	}
+	if limit != 0 {
+		con = con.Limit(limit)
+	}
+	if offset != 0 {
+		con = con.Offset(offset)
+	}
+	err := con.Find(objs).Error
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+// get by id
+func (db DB) GetById(obj interface{}, id uint64) error {
+	err := db.orm.First(obj, id).Error
+	if err != nil {
+		return err
+	}
+	return nil
+}
+func (db DB) Update(obj interface{}, para map[string]interface{}) error {
+	tx := db.orm.Begin()
+
+	err := tx.Model(obj).Updates(para).Error
+	if err != nil {
+		tx.Rollback()
+		return err
+	}
+
+	err = tx.Commit().Error
+	if err != nil {
+		tx.Rollback()
+		return err
+	}
+	return nil
+}
+func (db DB) Delete(obj interface{}, para map[string]interface{}) error {
+	tx := db.orm.Begin()
+
+	err := tx.Where(para).Delete(obj).Error
+	if err != nil {
+		tx.Rollback()
+		return err
+	}
+
+	err = tx.Commit().Error
+	if err != nil {
+		tx.Rollback()
+		return err
+	}
+	return nil
+}
+
+// get tables
+func (db DB) GetTables() ([]interface{}, error) {
+	var tables []interface{}
+	if db.driver == SQLITE_DRIVER {
+		ts, err := db.sqliteTables()
+		if err != nil {
+			return ts, err
+		}
+		tables = ts
+	}
+	if db.driver == POSTGRES_DRIVER {
+		tp, err := db.Select("select table_name from information_schema.tables", Filter{Field: "table_type", Compare: "=", Value: "BASE TABLE"})
+		if err != nil {
+			return tp, err
+		}
+		tables = tp
+	}
+	return tables, nil
+}
+func (db DB) GetMeta(tableName interface{}) (interface{}, error) {
+	var meta interface{}
+	if db.driver == SQLITE_DRIVER {
+		tm, err := db.sqliteMeta(tableName)
+		if err != nil {
+			return meta, err
+		}
+		meta = tm
+	}
+	if db.driver == POSTGRES_DRIVER {
+		pm, err := db.postgresMeta(fmt.Sprint(tableName))
+		if err != nil {
+			return pm, err
+		}
+		meta = pm
+	}
+	return meta, nil
+}
+func (db DB) postgresMeta(tableName string) ([]interface{}, error) {
+	q := "SELECT columns.table_name,columns.column_name,columns.data_type,columns.column_default,columns.is_nullable FROM information_schema.columns"
+	mp, err := db.Select(q, Filter{Field: "columns.table_name", Compare: "=", Value: tableName})
+	if err != nil {
+		return nil, err
+	}
+	return mp, nil
+}
+
+// get table meta data
+func (db DB) sqliteMeta(tableName interface{}) ([]TableInfo, error) {
+	var info []TableInfo
+	str := fmt.Sprint(tableName)
+	q := "pragma table_info(" + str + ")"
+	row, err := db.orm.DB().Query(q)
+	if err != nil {
+		return info, err
+	}
+	var cid uint
+	var t string
+	var name string
+	var notnull string
+	var pk int
+	var dfltValue interface{}
+	for row.Next() {
+		err = row.Scan(&cid, &name, &t, &notnull, &dfltValue, &pk)
+		if err != nil {
+			return info, err
+		}
+		table_info := TableInfo{
+			Cid:       cid,
+			Name:      name,
+			Type:      t,
+			Notnull:   notnull,
+			DfltValue: dfltValue,
+			Pk:        pk,
+		}
+		info = append(info, table_info)
+	}
+	return info, nil
+}
+func (db DB) Select(para string, filter Filter) ([]interface{}, error) {
+	var tables []interface{}
+	row, err := db.orm.Select(para).Where(filter.Field+" "+filter.Compare+" ?", filter.Value).Rows()
+	if err != nil {
+		return tables, err
+	}
+	columns, err := row.Columns()
+	if err != nil {
+		return tables, err
+	}
+	for row.Next() {
+		values := make([]interface{}, len(columns))
+		record := make([]interface{}, len(columns))
+		for i, _ := range columns {
+			values[i] = &record[i]
+		}
+		err = row.Scan(values...)
+		if err != nil {
+			return tables, err
+		}
+		for _, v := range record {
+			var str string
+			switch value := v.(type) {
+			case int64:
+				str = fmt.Sprint(value)
+			case float64:
+				str = fmt.Sprintf("%f", value)
+			default:
+				str = fmt.Sprintf("%s", value)
+			}
+			tables = append(tables, str)
+		}
+	}
+	return tables, nil
+}
+func (db DB) sqliteTables() ([]interface{}, error) {
+	var tables []interface{}
+	var sqlMaster []SqliteMaster
+	err := db.Get(&sqlMaster, nil, "", 0, 0, false)
+	if err != nil {
+		return tables, err
+	}
+	for _, t := range sqlMaster {
+		if t.Type == "table" {
+			tables = append(tables, t.TblName)
+		}
+	}
+	return tables, nil
+}

db.go

@@ -0,0 +1,46 @@
+package db
+
+import (
+	"errors"
+	"sync"
+
+	"github.com/jinzhu/gorm"
+	_ "github.com/lib/pq"
+	_ "github.com/mattn/go-sqlite3"
+)
+
+const (
+	SQLITE_DRIVER   = "sqlite3"
+	POSTGRES_DRIVER = "postgres"
+)
+
+type DB struct {
+	orm    *gorm.DB
+	mutex  *sync.Mutex
+	driver string
+}
+
+// databe driver name
+//support databes 'sqlite3','postgres'
+func Open(driver string, args ...interface{}) (*DB, error) {
+	if driver == "" {
+		return nil, errors.New("Invalid driver name.")
+	}
+	d, err := gorm.Open(driver, args)
+	if err != nil {
+		return nil, err
+	}
+	return &DB{orm: d, mutex: &sync.Mutex{}, driver: driver}, nil
+}
+func (db DB) isSqlite() bool {
+	if db.driver == SQLITE_DRIVER {
+		return true
+	}
+	return false
+}
+func (db DB) isPostgres() bool {
+	if db.driver == POSTGRES_DRIVER {
+		return true
+	}
+	return false
+}

go.mod

@@ -0,0 +1,9 @@
+module git.mokkon.com/soethu/go-db
+
+go 1.12
+
+require (
+	github.com/jinzhu/gorm v1.9.11
+	github.com/lib/pq v1.2.0
+	github.com/mattn/go-sqlite3 v1.11.0
+)

go.sum

@@ -0,0 +1,126 @@
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uitil.go

@@ -0,0 +1,90 @@
+package db
+
+import (
+	"fmt"
+	"time"
+)
+
+// key and value extract
+func whereExactKeyValues(where map[string]interface{}) (keys string, values []interface{}) {
+	var i = 1
+	if where != nil && len(where) > 0 {
+		for k, v := range where {
+			if keys != "" {
+				keys = keys + " and "
+			}
+			if vv, ok := v.(string); ok {
+				values = append(values, vv)                   //  value
+				keys = fmt.Sprintf("%s %s = $%d", keys, k, i) // key like $#
+			} else {
+				values = append(values, v)                    // value
+				keys = fmt.Sprintf("%s %s = $%d", keys, k, i) // key = $#
+			}
+			i = i + 1
+		}
+	}
+	return
+}
+
+//convert milli time to date format
+func TimestampDate(m int64) time.Time {
+	return time.Unix(m/1e3, (m%1e3)*int64(time.Millisecond)/int64(time.Nanosecond))
+}
+
+// make time to milli format
+func TimestampMilli(t time.Time) int64 {
+	return unixMilli(t)
+}
+
+// make milli time
+func unixMilli(t time.Time) int64 {
+	return t.Round(time.Millisecond).UnixNano() / (int64(time.Millisecond) / int64(time.Nanosecond))
+}
+
+// return true if float64 type , else false
+func IsFloat64(value interface{}) bool {
+	if _, ok := value.(float64); ok {
+		return true
+	}
+	return false
+}
+
+// return true if float32 type , else false
+func IsFloat32(value interface{}) bool {
+	if _, ok := value.(float32); ok {
+		return true
+	}
+	return false
+}
+
+// return true if bool type , else false
+func IsBoolean(value interface{}) bool {
+	if _, ok := value.(bool); ok {
+		return true
+	}
+	return false
+}
+
+// return true if int type , else false
+func IsInt(value interface{}) bool {
+	if _, ok := value.(int); ok {
+		return true
+	}
+	return false
+}
+
+// return true if int64 type , else false
+func IsInt64(value interface{}) bool {
+	if _, ok := value.(int64); ok {
+		return true
+	}
+	return false
+}
+
+// return true if map[string]interface{} type , else false
+func IsMap(value interface{}) bool {
+	if _, ok := value.(map[string]interface{}); ok {
+		return true
+	}
+	return false
+}

vo.go

@@ -0,0 +1,30 @@
+package db
+
+import "time"
+
+type Model struct {
+	ID        uint `json:"id" gorm:"primary_key"`
+	CreatedAt time.Time
+	UpdatedAt time.Time
+	DeletedAt *time.Time `sql:"index"`
+}
+type SqliteMaster struct {
+	Type     string `json:"type"`
+	TblName  string `json:"tbl_name"`
+	RootPage string `json:"root_page"`
+	Name     string `json:"name"`
+	Sql      string `json:"sql"`
+}
+type TableInfo struct {
+	Cid       uint        `json:"cid"`
+	Type      string      `json:"type"`
+	Name      string      `json:"name"`
+	Notnull   string      `json:"not_null"`
+	Pk        int         `json:"pk"`
+	DfltValue interface{} `json:"deflt_value"`
+}
+type Filter struct {
+	Field   string      `json:"field"`
+	Compare string      `json:"compare"`
+	Value   interface{} `json:"value"`
+}