forked from mirror/gorm
564 lines
17 KiB
Go
564 lines
17 KiB
Go
package schema
|
|
|
|
import (
|
|
"database/sql"
|
|
"database/sql/driver"
|
|
"fmt"
|
|
"reflect"
|
|
"strconv"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/jinzhu/now"
|
|
)
|
|
|
|
type DataType string
|
|
|
|
const (
|
|
Bool DataType = "bool"
|
|
Int = "int"
|
|
Uint = "uint"
|
|
Float = "float"
|
|
String = "string"
|
|
Time = "time"
|
|
Bytes = "bytes"
|
|
)
|
|
|
|
type Field struct {
|
|
Name string
|
|
DBName string
|
|
BindNames []string
|
|
DataType DataType
|
|
DBDataType string
|
|
PrimaryKey bool
|
|
AutoIncrement bool
|
|
Creatable bool
|
|
Updatable bool
|
|
HasDefaultValue bool
|
|
DefaultValue string
|
|
NotNull bool
|
|
Unique bool
|
|
Comment string
|
|
Size int
|
|
Precision int
|
|
FieldType reflect.Type
|
|
IndirectFieldType reflect.Type
|
|
StructField reflect.StructField
|
|
Tag reflect.StructTag
|
|
TagSettings map[string]string
|
|
Schema *Schema
|
|
EmbeddedSchema *Schema
|
|
ReflectValuer func(reflect.Value) reflect.Value
|
|
Valuer func(reflect.Value) interface{}
|
|
Setter func(reflect.Value, interface{}) error
|
|
}
|
|
|
|
func (schema *Schema) ParseField(fieldStruct reflect.StructField) *Field {
|
|
field := &Field{
|
|
Name: fieldStruct.Name,
|
|
BindNames: []string{fieldStruct.Name},
|
|
FieldType: fieldStruct.Type,
|
|
IndirectFieldType: fieldStruct.Type,
|
|
StructField: fieldStruct,
|
|
Creatable: true,
|
|
Updatable: true,
|
|
Tag: fieldStruct.Tag,
|
|
TagSettings: ParseTagSetting(fieldStruct.Tag),
|
|
Schema: schema,
|
|
}
|
|
|
|
for field.IndirectFieldType.Kind() == reflect.Ptr {
|
|
field.IndirectFieldType = field.IndirectFieldType.Elem()
|
|
}
|
|
|
|
fieldValue := reflect.New(field.IndirectFieldType)
|
|
// if field is valuer, used its value or first fields as data type
|
|
if valuer, isValuer := fieldValue.Interface().(driver.Valuer); isValuer {
|
|
var overrideFieldValue bool
|
|
if v, err := valuer.Value(); v != nil && err == nil {
|
|
overrideFieldValue = true
|
|
fieldValue = reflect.ValueOf(v)
|
|
}
|
|
|
|
if field.IndirectFieldType.Kind() == reflect.Struct {
|
|
for i := 0; i < field.IndirectFieldType.NumField(); i++ {
|
|
if !overrideFieldValue {
|
|
newFieldType := field.IndirectFieldType.Field(i).Type
|
|
for newFieldType.Kind() == reflect.Ptr {
|
|
newFieldType = newFieldType.Elem()
|
|
}
|
|
|
|
fieldValue = reflect.New(newFieldType)
|
|
overrideFieldValue = true
|
|
}
|
|
|
|
// copy tag settings from valuer
|
|
for key, value := range ParseTagSetting(field.IndirectFieldType.Field(i).Tag) {
|
|
if _, ok := field.TagSettings[key]; !ok {
|
|
field.TagSettings[key] = value
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// setup permission
|
|
if _, ok := field.TagSettings["-"]; ok {
|
|
field.Creatable = false
|
|
field.Updatable = false
|
|
}
|
|
|
|
if dbName, ok := field.TagSettings["COLUMN"]; ok {
|
|
field.DBName = dbName
|
|
}
|
|
|
|
if val, ok := field.TagSettings["PRIMARYKEY"]; ok && checkTruth(val) {
|
|
field.PrimaryKey = true
|
|
}
|
|
|
|
if val, ok := field.TagSettings["AUTOINCREMENT"]; ok && checkTruth(val) {
|
|
field.AutoIncrement = true
|
|
field.HasDefaultValue = true
|
|
}
|
|
|
|
if v, ok := field.TagSettings["DEFAULT"]; ok {
|
|
field.HasDefaultValue = true
|
|
field.DefaultValue = v
|
|
}
|
|
|
|
if num, ok := field.TagSettings["SIZE"]; ok {
|
|
field.Size, _ = strconv.Atoi(num)
|
|
}
|
|
|
|
if p, ok := field.TagSettings["PRECISION"]; ok {
|
|
field.Precision, _ = strconv.Atoi(p)
|
|
}
|
|
|
|
if val, ok := field.TagSettings["NOT NULL"]; ok && checkTruth(val) {
|
|
field.NotNull = true
|
|
}
|
|
|
|
if val, ok := field.TagSettings["UNIQUE"]; ok && checkTruth(val) {
|
|
field.Unique = true
|
|
}
|
|
|
|
if val, ok := field.TagSettings["COMMENT"]; ok {
|
|
field.Comment = val
|
|
}
|
|
|
|
if val, ok := field.TagSettings["TYPE"]; ok {
|
|
field.DBDataType = val
|
|
}
|
|
|
|
switch fieldValue.Elem().Kind() {
|
|
case reflect.Bool:
|
|
field.DataType = Bool
|
|
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
|
|
field.DataType = Int
|
|
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
|
|
field.DataType = Uint
|
|
case reflect.Float32, reflect.Float64:
|
|
field.DataType = Float
|
|
case reflect.String:
|
|
field.DataType = String
|
|
case reflect.Struct:
|
|
if _, ok := fieldValue.Interface().(*time.Time); ok {
|
|
field.DataType = Time
|
|
} else if fieldValue.Type().ConvertibleTo(reflect.TypeOf(&time.Time{})) {
|
|
field.DataType = Time
|
|
}
|
|
case reflect.Array, reflect.Slice:
|
|
if fieldValue.Type().Elem() == reflect.TypeOf(uint8(0)) {
|
|
field.DataType = Bytes
|
|
}
|
|
}
|
|
|
|
if field.Size == 0 {
|
|
switch fieldValue.Kind() {
|
|
case reflect.Int, reflect.Int64, reflect.Uint, reflect.Uint64, reflect.Float64:
|
|
field.Size = 64
|
|
case reflect.Int8, reflect.Uint8:
|
|
field.Size = 8
|
|
case reflect.Int16, reflect.Uint16:
|
|
field.Size = 16
|
|
case reflect.Int32, reflect.Uint32, reflect.Float32:
|
|
field.Size = 32
|
|
}
|
|
}
|
|
|
|
if _, ok := field.TagSettings["EMBEDDED"]; ok || fieldStruct.Anonymous {
|
|
var err error
|
|
field.Creatable = false
|
|
field.Updatable = false
|
|
if field.EmbeddedSchema, err = Parse(fieldValue.Interface(), &sync.Map{}, schema.namer); err != nil {
|
|
schema.err = err
|
|
}
|
|
for _, ef := range field.EmbeddedSchema.Fields {
|
|
ef.Schema = schema
|
|
ef.BindNames = append([]string{fieldStruct.Name}, ef.BindNames...)
|
|
// index is negative means is pointer
|
|
if field.FieldType.Kind() == reflect.Struct {
|
|
ef.StructField.Index = append([]int{fieldStruct.Index[0]}, ef.StructField.Index...)
|
|
} else {
|
|
ef.StructField.Index = append([]int{-fieldStruct.Index[0] - 1}, ef.StructField.Index...)
|
|
}
|
|
|
|
if prefix, ok := field.TagSettings["EMBEDDEDPREFIX"]; ok {
|
|
ef.DBName = prefix + ef.DBName
|
|
}
|
|
|
|
for k, v := range field.TagSettings {
|
|
ef.TagSettings[k] = v
|
|
}
|
|
}
|
|
}
|
|
|
|
return field
|
|
}
|
|
|
|
// ValueOf field value of
|
|
func (field *Field) ValueOf(value reflect.Value) interface{} {
|
|
if field != nil {
|
|
return field.Valuer(value)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (field *Field) Set(value reflect.Value, v interface{}) error {
|
|
if field != nil {
|
|
return field.Setter(value, v)
|
|
}
|
|
|
|
return fmt.Errorf("failed to set field value: %v", field.Name)
|
|
}
|
|
|
|
// create valuer, setter when parse struct
|
|
func (field *Field) setupValuerAndSetter() {
|
|
// Valuer
|
|
switch {
|
|
case len(field.StructField.Index) == 1:
|
|
field.Valuer = func(value reflect.Value) interface{} {
|
|
return reflect.Indirect(value).Field(field.StructField.Index[0]).Interface()
|
|
}
|
|
case len(field.StructField.Index) == 2 && field.StructField.Index[0] >= 0:
|
|
field.Valuer = func(value reflect.Value) interface{} {
|
|
return reflect.Indirect(value).Field(field.StructField.Index[0]).Field(field.StructField.Index[1]).Interface()
|
|
}
|
|
default:
|
|
field.Valuer = func(value reflect.Value) interface{} {
|
|
v := reflect.Indirect(value)
|
|
|
|
for _, idx := range field.StructField.Index {
|
|
if idx >= 0 {
|
|
v = v.Field(idx)
|
|
} else {
|
|
v = v.Field(-idx - 1)
|
|
|
|
if v.Type().Elem().Kind() == reflect.Struct {
|
|
if !v.IsNil() {
|
|
v = v.Elem()
|
|
}
|
|
} else {
|
|
return nil
|
|
}
|
|
}
|
|
}
|
|
return v.Interface()
|
|
}
|
|
}
|
|
|
|
// ReflectValuer
|
|
switch {
|
|
case len(field.StructField.Index) == 1:
|
|
if field.FieldType.Kind() == reflect.Ptr {
|
|
field.ReflectValuer = func(value reflect.Value) reflect.Value {
|
|
fieldValue := reflect.Indirect(value).Field(field.StructField.Index[0])
|
|
if fieldValue.IsNil() {
|
|
fieldValue.Set(reflect.New(field.FieldType.Elem()))
|
|
}
|
|
return fieldValue
|
|
}
|
|
} else {
|
|
field.ReflectValuer = func(value reflect.Value) reflect.Value {
|
|
return reflect.Indirect(value).Field(field.StructField.Index[0])
|
|
}
|
|
}
|
|
case len(field.StructField.Index) == 2 && field.StructField.Index[0] >= 0 && field.FieldType.Kind() != reflect.Ptr:
|
|
field.ReflectValuer = func(value reflect.Value) reflect.Value {
|
|
return reflect.Indirect(value).Field(field.StructField.Index[0]).Field(field.StructField.Index[1])
|
|
}
|
|
default:
|
|
field.ReflectValuer = func(value reflect.Value) reflect.Value {
|
|
v := reflect.Indirect(value)
|
|
for _, idx := range field.StructField.Index {
|
|
if idx >= 0 {
|
|
v = v.Field(idx)
|
|
} else {
|
|
v = v.Field(-idx - 1)
|
|
}
|
|
|
|
if v.Kind() == reflect.Ptr {
|
|
if v.Type().Elem().Kind() == reflect.Struct {
|
|
if v.IsNil() {
|
|
v.Set(reflect.New(v.Type().Elem()))
|
|
}
|
|
}
|
|
|
|
if idx < len(field.StructField.Index)-1 {
|
|
v = v.Elem()
|
|
}
|
|
}
|
|
}
|
|
return v
|
|
}
|
|
}
|
|
|
|
recoverFunc := func(value reflect.Value, v interface{}, setter func(reflect.Value, interface{}) error) (err error) {
|
|
reflectV := reflect.ValueOf(v)
|
|
if reflectV.Type().ConvertibleTo(field.FieldType) {
|
|
field.ReflectValuer(value).Set(reflectV.Convert(field.FieldType))
|
|
} else if valuer, ok := v.(driver.Valuer); ok {
|
|
if v, err = valuer.Value(); err == nil {
|
|
return setter(value, v)
|
|
}
|
|
} else if field.FieldType.Kind() == reflect.Ptr && reflectV.Type().ConvertibleTo(field.FieldType.Elem()) {
|
|
field.ReflectValuer(value).Elem().Set(reflectV.Convert(field.FieldType.Elem()))
|
|
} else if reflectV.Kind() == reflect.Ptr {
|
|
return field.Setter(value, reflectV.Elem().Interface())
|
|
} else {
|
|
return fmt.Errorf("failed to set value %+v to field %v", v, field.Name)
|
|
}
|
|
return err
|
|
}
|
|
|
|
// Setter
|
|
switch field.FieldType.Kind() {
|
|
case reflect.Bool:
|
|
field.Setter = func(value reflect.Value, v interface{}) error {
|
|
switch data := v.(type) {
|
|
case bool:
|
|
field.ReflectValuer(value).SetBool(data)
|
|
case *bool:
|
|
field.ReflectValuer(value).SetBool(*data)
|
|
default:
|
|
return recoverFunc(value, v, field.Setter)
|
|
}
|
|
return nil
|
|
}
|
|
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
|
|
field.Setter = func(value reflect.Value, v interface{}) (err error) {
|
|
switch data := v.(type) {
|
|
case int64:
|
|
field.ReflectValuer(value).SetInt(data)
|
|
case int:
|
|
field.ReflectValuer(value).SetInt(int64(data))
|
|
case int8:
|
|
field.ReflectValuer(value).SetInt(int64(data))
|
|
case int16:
|
|
field.ReflectValuer(value).SetInt(int64(data))
|
|
case int32:
|
|
field.ReflectValuer(value).SetInt(int64(data))
|
|
case uint:
|
|
field.ReflectValuer(value).SetInt(int64(data))
|
|
case uint8:
|
|
field.ReflectValuer(value).SetInt(int64(data))
|
|
case uint16:
|
|
field.ReflectValuer(value).SetInt(int64(data))
|
|
case uint32:
|
|
field.ReflectValuer(value).SetInt(int64(data))
|
|
case uint64:
|
|
field.ReflectValuer(value).SetInt(int64(data))
|
|
case float32:
|
|
field.ReflectValuer(value).SetInt(int64(data))
|
|
case float64:
|
|
field.ReflectValuer(value).SetInt(int64(data))
|
|
case []byte:
|
|
return field.Setter(value, string(data))
|
|
case string:
|
|
if i, err := strconv.ParseInt(data, 0, 64); err == nil {
|
|
field.ReflectValuer(value).SetInt(i)
|
|
} else {
|
|
return err
|
|
}
|
|
default:
|
|
return recoverFunc(value, v, field.Setter)
|
|
}
|
|
return err
|
|
}
|
|
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
|
|
field.Setter = func(value reflect.Value, v interface{}) (err error) {
|
|
switch data := v.(type) {
|
|
case uint64:
|
|
field.ReflectValuer(value).SetUint(data)
|
|
case uint:
|
|
field.ReflectValuer(value).SetUint(uint64(data))
|
|
case uint8:
|
|
field.ReflectValuer(value).SetUint(uint64(data))
|
|
case uint16:
|
|
field.ReflectValuer(value).SetUint(uint64(data))
|
|
case uint32:
|
|
field.ReflectValuer(value).SetUint(uint64(data))
|
|
case int64:
|
|
field.ReflectValuer(value).SetUint(uint64(data))
|
|
case int:
|
|
field.ReflectValuer(value).SetUint(uint64(data))
|
|
case int8:
|
|
field.ReflectValuer(value).SetUint(uint64(data))
|
|
case int16:
|
|
field.ReflectValuer(value).SetUint(uint64(data))
|
|
case int32:
|
|
field.ReflectValuer(value).SetUint(uint64(data))
|
|
case float32:
|
|
field.ReflectValuer(value).SetUint(uint64(data))
|
|
case float64:
|
|
field.ReflectValuer(value).SetUint(uint64(data))
|
|
case []byte:
|
|
return field.Setter(value, string(data))
|
|
case string:
|
|
if i, err := strconv.ParseUint(data, 0, 64); err == nil {
|
|
field.ReflectValuer(value).SetUint(i)
|
|
} else {
|
|
return err
|
|
}
|
|
default:
|
|
return recoverFunc(value, v, field.Setter)
|
|
}
|
|
return err
|
|
}
|
|
case reflect.Float32, reflect.Float64:
|
|
field.Setter = func(value reflect.Value, v interface{}) (err error) {
|
|
switch data := v.(type) {
|
|
case float64:
|
|
field.ReflectValuer(value).SetFloat(data)
|
|
case float32:
|
|
field.ReflectValuer(value).SetFloat(float64(data))
|
|
case int64:
|
|
field.ReflectValuer(value).SetFloat(float64(data))
|
|
case int:
|
|
field.ReflectValuer(value).SetFloat(float64(data))
|
|
case int8:
|
|
field.ReflectValuer(value).SetFloat(float64(data))
|
|
case int16:
|
|
field.ReflectValuer(value).SetFloat(float64(data))
|
|
case int32:
|
|
field.ReflectValuer(value).SetFloat(float64(data))
|
|
case uint:
|
|
field.ReflectValuer(value).SetFloat(float64(data))
|
|
case uint8:
|
|
field.ReflectValuer(value).SetFloat(float64(data))
|
|
case uint16:
|
|
field.ReflectValuer(value).SetFloat(float64(data))
|
|
case uint32:
|
|
field.ReflectValuer(value).SetFloat(float64(data))
|
|
case uint64:
|
|
field.ReflectValuer(value).SetFloat(float64(data))
|
|
case []byte:
|
|
return field.Setter(value, string(data))
|
|
case string:
|
|
if i, err := strconv.ParseFloat(data, 64); err == nil {
|
|
field.ReflectValuer(value).SetFloat(i)
|
|
} else {
|
|
return err
|
|
}
|
|
default:
|
|
return recoverFunc(value, v, field.Setter)
|
|
}
|
|
return err
|
|
}
|
|
case reflect.String:
|
|
field.Setter = func(value reflect.Value, v interface{}) (err error) {
|
|
switch data := v.(type) {
|
|
case string:
|
|
field.ReflectValuer(value).SetString(data)
|
|
case []byte:
|
|
field.ReflectValuer(value).SetString(string(data))
|
|
case int, int8, int16, int32, int64, uint, uint8, uint16, uint32, uint64:
|
|
field.ReflectValuer(value).SetString(fmt.Sprint(data))
|
|
case float64, float32:
|
|
field.ReflectValuer(value).SetString(fmt.Sprintf("%."+strconv.Itoa(field.Precision)+"f", data))
|
|
default:
|
|
return recoverFunc(value, v, field.Setter)
|
|
}
|
|
return err
|
|
}
|
|
default:
|
|
fieldValue := reflect.New(field.FieldType)
|
|
switch fieldValue.Elem().Interface().(type) {
|
|
case time.Time:
|
|
field.Setter = func(value reflect.Value, v interface{}) error {
|
|
switch data := v.(type) {
|
|
case time.Time:
|
|
field.ReflectValuer(value).Set(reflect.ValueOf(v))
|
|
case *time.Time:
|
|
field.ReflectValuer(value).Set(reflect.ValueOf(v).Elem())
|
|
case string:
|
|
if t, err := now.Parse(data); err == nil {
|
|
field.ReflectValuer(value).Set(reflect.ValueOf(t))
|
|
} else {
|
|
return fmt.Errorf("failed to set string %v to time.Time field %v, failed to parse it as time, got error %v", v, field.Name, err)
|
|
}
|
|
default:
|
|
return recoverFunc(value, v, field.Setter)
|
|
}
|
|
return nil
|
|
}
|
|
case *time.Time:
|
|
field.Setter = func(value reflect.Value, v interface{}) error {
|
|
switch data := v.(type) {
|
|
case time.Time:
|
|
field.ReflectValuer(value).Elem().Set(reflect.ValueOf(v))
|
|
case *time.Time:
|
|
field.ReflectValuer(value).Set(reflect.ValueOf(v))
|
|
case string:
|
|
if t, err := now.Parse(data); err == nil {
|
|
field.ReflectValuer(value).Elem().Set(reflect.ValueOf(t))
|
|
} else {
|
|
return fmt.Errorf("failed to set string %v to time.Time field %v, failed to parse it as time, got error %v", v, field.Name, err)
|
|
}
|
|
default:
|
|
return recoverFunc(value, v, field.Setter)
|
|
}
|
|
return nil
|
|
}
|
|
default:
|
|
if _, ok := fieldValue.Interface().(sql.Scanner); ok {
|
|
// struct scanner
|
|
field.Setter = func(value reflect.Value, v interface{}) (err error) {
|
|
reflectV := reflect.ValueOf(v)
|
|
if reflectV.Type().ConvertibleTo(field.FieldType) {
|
|
field.ReflectValuer(value).Set(reflectV.Convert(field.FieldType))
|
|
} else if valuer, ok := v.(driver.Valuer); ok {
|
|
if v, err = valuer.Value(); err == nil {
|
|
err = field.ReflectValuer(value).Addr().Interface().(sql.Scanner).Scan(v)
|
|
}
|
|
} else {
|
|
err = field.ReflectValuer(value).Addr().Interface().(sql.Scanner).Scan(v)
|
|
}
|
|
return
|
|
}
|
|
} else if _, ok := fieldValue.Elem().Interface().(sql.Scanner); ok {
|
|
// pointer scanner
|
|
field.Setter = func(value reflect.Value, v interface{}) (err error) {
|
|
reflectV := reflect.ValueOf(v)
|
|
if reflectV.Type().ConvertibleTo(field.FieldType) {
|
|
field.ReflectValuer(value).Set(reflectV.Convert(field.FieldType))
|
|
} else if reflectV.Type().ConvertibleTo(field.FieldType.Elem()) {
|
|
field.ReflectValuer(value).Elem().Set(reflectV.Convert(field.FieldType.Elem()))
|
|
} else if valuer, ok := v.(driver.Valuer); ok {
|
|
if v, err = valuer.Value(); err == nil {
|
|
err = field.ReflectValuer(value).Interface().(sql.Scanner).Scan(v)
|
|
}
|
|
} else {
|
|
err = field.ReflectValuer(value).Interface().(sql.Scanner).Scan(v)
|
|
}
|
|
return
|
|
}
|
|
} else {
|
|
field.Setter = func(value reflect.Value, v interface{}) (err error) {
|
|
return recoverFunc(value, v, field.Setter)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|