Add creatable, updatable, readable permission

callbacks/create.go

@@ -194,13 +194,13 @@ func AfterCreate(db *gorm.DB) {
 func ConvertToCreateValues(stmt *gorm.Statement) clause.Values {
 	switch value := stmt.Dest.(type) {
 	case map[string]interface{}:
-		return ConvertMapToValues(stmt, value)
+		return ConvertMapToValuesForCreate(stmt, value)
 	case []map[string]interface{}:
-		return ConvertSliceOfMapToValues(stmt, value)
+		return ConvertSliceOfMapToValuesForCreate(stmt, value)
 	default:
 		var (
 			values                    = clause.Values{}
-			selectColumns, restricted = SelectAndOmitColumns(stmt)
+			selectColumns, restricted = SelectAndOmitColumns(stmt, true, false)
 			curTime                   = stmt.DB.NowFunc()
 			isZero                    = false
 		)

callbacks/helper.go

@@ -8,7 +8,7 @@ import (
 )
 
 // SelectAndOmitColumns get select and omit columns, select -> true, omit -> false
-func SelectAndOmitColumns(stmt *gorm.Statement) (map[string]bool, bool) {
+func SelectAndOmitColumns(stmt *gorm.Statement, requireCreate, requireUpdate bool) (map[string]bool, bool) {
 	results := map[string]bool{}
 
 	// select columns
@@ -36,13 +36,23 @@ func SelectAndOmitColumns(stmt *gorm.Statement) (map[string]bool, bool) {
 		}
 	}
 
+	if stmt.Schema != nil {
+		for _, field := range stmt.Schema.FieldsByDBName {
+			if requireCreate && !field.Creatable {
+				results[field.DBName] = false
+			} else if requireUpdate && !field.Updatable {
+				results[field.DBName] = false
+			}
+		}
+	}
+
 	return results, len(stmt.Selects) > 0
 }
 
-// ConvertMapToValues convert map to values
-func ConvertMapToValues(stmt *gorm.Statement, mapValue map[string]interface{}) (values clause.Values) {
+// ConvertMapToValuesForCreate convert map to values
+func ConvertMapToValuesForCreate(stmt *gorm.Statement, mapValue map[string]interface{}) (values clause.Values) {
 	columns := make([]string, 0, len(mapValue))
-	selectColumns, restricted := SelectAndOmitColumns(stmt)
+	selectColumns, restricted := SelectAndOmitColumns(stmt, true, false)
 
 	var keys []string
 	for k, _ := range mapValue {
@@ -64,12 +74,12 @@ func ConvertMapToValues(stmt *gorm.Statement, mapValue map[string]interface{}) (
 	return
 }
 
-// ConvertSliceOfMapToValues convert slice of map to values
-func ConvertSliceOfMapToValues(stmt *gorm.Statement, mapValues []map[string]interface{}) (values clause.Values) {
+// ConvertSliceOfMapToValuesForCreate convert slice of map to values
+func ConvertSliceOfMapToValuesForCreate(stmt *gorm.Statement, mapValues []map[string]interface{}) (values clause.Values) {
 	var (
 		columns                   = []string{}
 		result                    = map[string][]interface{}{}
-		selectColumns, restricted = SelectAndOmitColumns(stmt)
+		selectColumns, restricted = SelectAndOmitColumns(stmt, true, false)
 	)
 
 	for idx, mapValue := range mapValues {

callbacks/scan.go

@@ -56,7 +56,11 @@ func Scan(rows *sql.Rows, db *gorm.DB) {
 			fields := make([]*schema.Field, len(columns))
 
 			for idx, column := range columns {
-				fields[idx] = db.Statement.Schema.LookUpField(column)
+				if field := db.Statement.Schema.LookUpField(column); field != nil && field.Readable {
+					fields[idx] = field
+				} else {
+					values[idx] = sql.RawBytes{}
+				}
 			}
 
 			for rows.Next() {
@@ -80,7 +84,7 @@ func Scan(rows *sql.Rows, db *gorm.DB) {
 			}
 		case reflect.Struct:
 			for idx, column := range columns {
-				if field := db.Statement.Schema.LookUpField(column); field != nil {
+				if field := db.Statement.Schema.LookUpField(column); field != nil && field.Readable {
 					values[idx] = field.ReflectValueOf(db.Statement.ReflectValue).Addr().Interface()
 				} else {
 					values[idx] = sql.RawBytes{}

callbacks/update.go

@@ -91,7 +91,7 @@ func AfterUpdate(db *gorm.DB) {
 
 // ConvertToAssignments convert to update assignments
 func ConvertToAssignments(stmt *gorm.Statement) (set clause.Set) {
-	selectColumns, restricted := SelectAndOmitColumns(stmt)
+	selectColumns, restricted := SelectAndOmitColumns(stmt, false, true)
 	reflectModelValue := reflect.ValueOf(stmt.Model)
 
 	switch value := stmt.Dest.(type) {

schema/field.go

@@ -42,6 +42,7 @@ type Field struct {
 	AutoIncrement         bool
 	Creatable             bool
 	Updatable             bool
+	Readable              bool
 	HasDefaultValue       bool
 	AutoCreateTime        TimeType
 	AutoUpdateTime        TimeType
@@ -73,6 +74,7 @@ func (schema *Schema) ParseField(fieldStruct reflect.StructField) *Field {
 		StructField:       fieldStruct,
 		Creatable:         true,
 		Updatable:         true,
+		Readable:          true,
 		Tag:               fieldStruct.Tag,
 		TagSettings:       ParseTagSetting(fieldStruct.Tag.Get("gorm"), ";"),
 		Schema:            schema,
@@ -117,6 +119,21 @@ func (schema *Schema) ParseField(fieldStruct reflect.StructField) *Field {
 	if _, ok := field.TagSettings["-"]; ok {
 		field.Creatable = false
 		field.Updatable = false
+		field.Readable = false
+	}
+
+	if v, ok := field.TagSettings["<-"]; ok {
+		if !strings.Contains(v, "create") {
+			field.Creatable = false
+		}
+
+		if !strings.Contains(v, "update") {
+			field.Updatable = false
+		}
+	}
+
+	if _, ok := field.TagSettings["->"]; ok {
+		field.Readable = false
 	}
 
 	if dbName, ok := field.TagSettings["COLUMN"]; ok {
@@ -235,6 +252,7 @@ func (schema *Schema) ParseField(fieldStruct reflect.StructField) *Field {
 		var err error
 		field.Creatable = false
 		field.Updatable = false
+		field.Readable = false
 		if field.EmbeddedSchema, err = Parse(fieldValue.Interface(), &sync.Map{}, schema.namer); err != nil {
 			schema.err = err
 		}