enhancement

orm/db_alias.go

@@ -80,7 +80,7 @@ type _dbCache struct {
 func (ac *_dbCache) add(name string, al *alias) (added bool) {
 	ac.mux.Lock()
 	defer ac.mux.Unlock()
-	if _, ok := ac.cache[name]; ok == false {
+	if _, ok := ac.cache[name]; !ok {
 		ac.cache[name] = al
 		added = true
 	}

orm/models_boot.go

@@ -15,7 +15,6 @@
 package orm
 
 import (
-	"errors"
 	"fmt"
 	"os"
 	"reflect"
@@ -55,34 +54,34 @@ func registerModel(prefix string, model interface{}) {
 		os.Exit(2)
 	}
 
-	info := newModelInfo(val)
-	if info.fields.pk == nil {
+	mi := newModelInfo(val)
+	if mi.fields.pk == nil {
 	outFor:
-		for _, fi := range info.fields.fieldsDB {
+		for _, fi := range mi.fields.fieldsDB {
 			if strings.ToLower(fi.name) == "id" {
 				switch fi.addrValue.Elem().Kind() {
 				case reflect.Int, reflect.Int32, reflect.Int64, reflect.Uint, reflect.Uint32, reflect.Uint64:
 					fi.auto = true
 					fi.pk = true
-					info.fields.pk = fi
+					mi.fields.pk = fi
 					break outFor
 				}
 			}
 		}
 
-		if info.fields.pk == nil {
+		if mi.fields.pk == nil {
 			fmt.Printf("<orm.RegisterModel> `%s` need a primary key field, default use 'id' if not set\n", name)
 			os.Exit(2)
 		}
 
 	}
 
-	info.table = table
-	info.pkg = typ.PkgPath()
-	info.model = model
-	info.manual = true
+	mi.table = table
+	mi.pkg = typ.PkgPath()
+	mi.model = model
+	mi.manual = true
 
-	modelCache.set(table, info)
+	modelCache.set(table, mi)
 }
 
 // boostrap models
@@ -90,12 +89,10 @@ func bootStrap() {
 	if modelCache.done {
 		return
 	}
-
 	var (
 		err    error
 		models map[string]*modelInfo
 	)
-
 	if dataBaseCache.getDefault() == nil {
 		err = fmt.Errorf("must have one register DataBase alias named `default`")
 		goto end
@@ -106,14 +103,13 @@ func bootStrap() {
 		for _, fi := range mi.fields.columns {
 			if fi.rel || fi.reverse {
 				elm := fi.addrValue.Type().Elem()
-				switch fi.fieldType {
-				case RelReverseMany, RelManyToMany:
+				if fi.fieldType == RelReverseMany || fi.fieldType == RelManyToMany {
 					elm = elm.Elem()
 				}
-
+				// check the rel or reverse model already register
 				name := getFullName(elm)
 				mii, ok := modelCache.getByFullName(name)
-				if ok == false || mii.pkg != elm.PkgPath() {
+				if !ok || mii.pkg != elm.PkgPath() {
 					err = fmt.Errorf("can not found rel in field `%s`, `%s` may be miss register", fi.fullName, elm.String())
 					goto end
 				}
@@ -122,20 +118,17 @@ func bootStrap() {
 				switch fi.fieldType {
 				case RelManyToMany:
 					if fi.relThrough != "" {
-						msg := fmt.Sprintf("field `%s` wrong rel_through value `%s`", fi.fullName, fi.relThrough)
 						if i := strings.LastIndex(fi.relThrough, "."); i != -1 && len(fi.relThrough) > (i+1) {
 							pn := fi.relThrough[:i]
 							rmi, ok := modelCache.getByFullName(fi.relThrough)
 							if ok == false || pn != rmi.pkg {
-								err = errors.New(msg + " cannot find table")
+								err = fmt.Errorf("field `%s` wrong rel_through value `%s` cannot find table", fi.fullName, fi.relThrough)
 								goto end
 							}
-
 							fi.relThroughModelInfo = rmi
 							fi.relTable = rmi.table
-
 						} else {
-							err = errors.New(msg)
+							err = fmt.Errorf("field `%s` wrong rel_through value `%s`", fi.fullName, fi.relThrough)
 							goto end
 						}
 					} else {
@@ -143,7 +136,6 @@ func bootStrap() {
 						if fi.relTable != "" {
 							i.table = fi.relTable
 						}
-
 						if v := modelCache.set(i.table, i); v != nil {
 							err = fmt.Errorf("the rel table name `%s` already registered, cannot be use, please change one", fi.relTable)
 							goto end

orm/models_info_f.go

@@ -104,7 +104,7 @@ type fieldInfo struct {
 	mi                  *modelInfo
 	fieldIndex          []int
 	fieldType           int
-	dbcol               bool
+	dbcol               bool // table column fk and onetoone
 	inModel             bool
 	name                string
 	fullName            string
@@ -116,13 +116,13 @@ type fieldInfo struct {
 	null                bool
 	index               bool
 	unique              bool
-	colDefault          bool
-	initial             StrTo
+	colDefault          bool  // whether has default tag
+	initial             StrTo // store the default value
 	size                int
 	toText              bool
 	autoNow             bool
 	autoNowAdd          bool
-	rel                 bool
+	rel                 bool // if type equal to RelForeignKey, RelOneToOne, RelManyToMany then true
 	reverse             bool
 	reverseField        string
 	reverseFieldInfo    *fieldInfo
@@ -134,7 +134,7 @@ type fieldInfo struct {
 	relModelInfo        *modelInfo
 	digits              int
 	decimals            int
-	isFielder           bool
+	isFielder           bool // implement Fielder interface
 	onDelete            string
 }
 
@@ -265,6 +265,9 @@ checkType:
 		}
 	}
 
+	// check the rel and reverse type
+	// rel should Ptr
+	// reverse should slice []*struct
 	switch fieldType {
 	case RelForeignKey, RelOneToOne, RelReverseOne:
 		if field.Kind() != reflect.Ptr {
@@ -403,14 +406,12 @@ checkType:
 
 	if fi.auto || fi.pk {
 		if fi.auto {
-
 			switch addrField.Elem().Kind() {
 			case reflect.Int, reflect.Int32, reflect.Int64, reflect.Uint, reflect.Uint32, reflect.Uint64:
 			default:
 				err = fmt.Errorf("auto primary key only support int, int32, int64, uint, uint32, uint64 but found `%s`", addrField.Elem().Kind())
 				goto end
 			}
-
 			fi.pk = true
 		}
 		fi.null = false
@@ -422,8 +423,8 @@ checkType:
 		fi.index = false
 	}
 
+	// can not set default for these type
 	if fi.auto || fi.pk || fi.unique || fieldType == TypeTimeField || fieldType == TypeDateField || fieldType == TypeDateTimeField {
-		// can not set default
 		initial.Clear()
 	}
 

orm/models_info_m.go

@@ -107,9 +107,9 @@ func newM2MModelInfo(m1, m2 *modelInfo) (mi *modelInfo) {
 	mi.name = camelString(mi.table)
 	mi.fullName = m1.pkg + "." + mi.name
 
-	fa := new(fieldInfo)
-	f1 := new(fieldInfo)
-	f2 := new(fieldInfo)
+	fa := new(fieldInfo) // pk
+	f1 := new(fieldInfo) // m1 table RelForeignKey
+	f2 := new(fieldInfo) // m2 table RelForeignKey
 	fa.fieldType = TypeBigIntegerField
 	fa.auto = true
 	fa.pk = true