初始

internal/app/system/dao/extend_dao.go

@@ -0,0 +1,37 @@
+package dao
+
+import (
+	"reflect"
+)
+
+// 解决多表排除字段不能用的情况
+// 例:FieldsEx(internal.SysUser,"a","ex_col1","ex_col2")
+func FieldsEx(obj interface{}, preFix string, exFields ...string) []string {
+	v := reflect.ValueOf(obj)
+	columnsMethod := v.MethodByName("Columns")
+	if !columnsMethod.IsValid() {
+		return []string{}
+	}
+	result := columnsMethod.Call([]reflect.Value{})
+
+	var fields []string
+	for i := 0; i < result[0].NumField(); i++ {
+		f := result[0].Field(i)
+		if f.Kind() == reflect.String {
+
+			if !isInArray(f.String(), exFields) {
+				fields = append(fields, preFix+"."+f.String())
+			}
+		}
+	}
+	return fields
+}
+
+func isInArray(str string, arr []string) bool {
+	for _, v := range arr {
+		if v == str {
+			return true
+		}
+	}
+	return false
+}