forked from mirror/gorm
130 lines
2.6 KiB
Go
130 lines
2.6 KiB
Go
package gorm
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import (
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"database/sql"
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"reflect"
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"strconv"
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"strings"
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"time"
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)
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type Field struct {
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Name string
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Value interface{}
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model *Model
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dbName string
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isPrimaryKey bool
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autoCreateTime bool
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autoUpdateTime bool
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foreignKey string
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beforeAssociation bool
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afterAssociation bool
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reflectValue reflect.Value
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structField reflect.StructField
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}
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func (f *Field) isBlank() bool {
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return isBlank(f.reflectValue)
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}
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func (f *Field) isScanner() bool {
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_, is_scanner := reflect.New(f.reflectValue.Type()).Interface().(sql.Scanner)
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return is_scanner
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}
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func (f *Field) isTime() bool {
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_, is_time := f.Value.(time.Time)
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return is_time
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}
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func (f *Field) sqlTag() (str string) {
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value := f.Value
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if f.isScanner() {
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value = f.reflectValue.Field(0).Interface()
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}
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reflect_value := f.reflectValue
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switch reflect_value.Kind() {
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case reflect.Slice:
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return
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case reflect.Struct:
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if !f.isTime() && !f.isScanner() {
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return
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}
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}
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typ, addational_typ, size := parseSqlTag(f.structField.Tag.Get(f.model.do.db.parent.tagIdentifier))
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if typ == "-" {
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return
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}
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if len(typ) == 0 {
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if f.isPrimaryKey {
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typ = f.model.do.dialect().PrimaryKeyTag(value, size)
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} else {
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typ = f.model.do.dialect().SqlTag(value, size)
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}
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}
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if len(addational_typ) > 0 {
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typ = typ + " " + addational_typ
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}
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return typ
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}
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func (f *Field) parseAssociation() {
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reflect_value := f.reflectValue
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switch reflect_value.Kind() {
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case reflect.Slice:
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foreign_key := f.model.typeName() + "Id"
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if reflect.New(reflect_value.Type().Elem()).Elem().FieldByName(foreign_key).IsValid() {
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f.foreignKey = foreign_key
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}
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f.afterAssociation = true
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case reflect.Struct:
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if !f.isTime() && !f.isScanner() {
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if f.model.reflectData().FieldByName(f.Name + "Id").IsValid() {
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f.foreignKey = f.Name + "Id"
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f.beforeAssociation = true
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} else {
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foreign_key := f.model.typeName() + "Id"
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if reflect.New(reflect_value.Type()).Elem().FieldByName(foreign_key).IsValid() {
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f.foreignKey = foreign_key
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}
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f.afterAssociation = true
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}
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}
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}
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}
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func parseSqlTag(str string) (typ string, addational_typ string, size int) {
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if str == "-" {
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typ = str
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} else if str != "" {
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tags := strings.Split(str, ";")
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m := make(map[string]string)
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for _, value := range tags {
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v := strings.Split(value, ":")
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k := strings.Trim(strings.ToUpper(v[0]), " ")
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if len(v) == 2 {
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m[k] = v[1]
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} else {
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m[k] = k
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}
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}
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if len(m["SIZE"]) > 0 {
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size, _ = strconv.Atoi(m["SIZE"])
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}
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if len(m["TYPE"]) > 0 {
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typ = m["TYPE"]
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}
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addational_typ = m["NOT NULL"] + " " + m["UNIQUE"]
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}
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return
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}
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