forked from mirror/gorm
641 lines
24 KiB
Go
641 lines
24 KiB
Go
package gorm
|
|
|
|
import (
|
|
"database/sql"
|
|
"errors"
|
|
"go/ast"
|
|
"reflect"
|
|
"strings"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/jinzhu/inflection"
|
|
)
|
|
|
|
// DefaultTableNameHandler default table name handler
|
|
var DefaultTableNameHandler = func(db *DB, defaultTableName string) string {
|
|
return defaultTableName
|
|
}
|
|
|
|
var modelStructsMap sync.Map
|
|
|
|
// ModelStruct model definition
|
|
type ModelStruct struct {
|
|
PrimaryFields []*StructField
|
|
StructFields []*StructField
|
|
ModelType reflect.Type
|
|
|
|
defaultTableName string
|
|
l sync.Mutex
|
|
}
|
|
|
|
// TableName returns model's table name
|
|
func (s *ModelStruct) TableName(db *DB) string {
|
|
s.l.Lock()
|
|
defer s.l.Unlock()
|
|
|
|
if s.defaultTableName == "" && db != nil && s.ModelType != nil {
|
|
// Set default table name
|
|
if tabler, ok := reflect.New(s.ModelType).Interface().(tabler); ok {
|
|
s.defaultTableName = tabler.TableName()
|
|
} else {
|
|
tableName := ToTableName(s.ModelType.Name())
|
|
if db == nil || !db.parent.singularTable {
|
|
tableName = inflection.Plural(tableName)
|
|
}
|
|
s.defaultTableName = tableName
|
|
}
|
|
}
|
|
|
|
return DefaultTableNameHandler(db, s.defaultTableName)
|
|
}
|
|
|
|
// StructField model field's struct definition
|
|
type StructField struct {
|
|
DBName string
|
|
Name string
|
|
Names []string
|
|
IsPrimaryKey bool
|
|
IsNormal bool
|
|
IsIgnored bool
|
|
IsScanner bool
|
|
HasDefaultValue bool
|
|
Tag reflect.StructTag
|
|
TagSettings map[string]string
|
|
Struct reflect.StructField
|
|
IsForeignKey bool
|
|
Relationship *Relationship
|
|
|
|
tagSettingsLock sync.RWMutex
|
|
}
|
|
|
|
// TagSettingsSet Sets a tag in the tag settings map
|
|
func (s *StructField) TagSettingsSet(key, val string) {
|
|
s.tagSettingsLock.Lock()
|
|
defer s.tagSettingsLock.Unlock()
|
|
s.TagSettings[key] = val
|
|
}
|
|
|
|
// TagSettingsGet returns a tag from the tag settings
|
|
func (s *StructField) TagSettingsGet(key string) (string, bool) {
|
|
s.tagSettingsLock.RLock()
|
|
defer s.tagSettingsLock.RUnlock()
|
|
val, ok := s.TagSettings[key]
|
|
return val, ok
|
|
}
|
|
|
|
// TagSettingsDelete deletes a tag
|
|
func (s *StructField) TagSettingsDelete(key string) {
|
|
s.tagSettingsLock.Lock()
|
|
defer s.tagSettingsLock.Unlock()
|
|
delete(s.TagSettings, key)
|
|
}
|
|
|
|
func (structField *StructField) clone() *StructField {
|
|
clone := &StructField{
|
|
DBName: structField.DBName,
|
|
Name: structField.Name,
|
|
Names: structField.Names,
|
|
IsPrimaryKey: structField.IsPrimaryKey,
|
|
IsNormal: structField.IsNormal,
|
|
IsIgnored: structField.IsIgnored,
|
|
IsScanner: structField.IsScanner,
|
|
HasDefaultValue: structField.HasDefaultValue,
|
|
Tag: structField.Tag,
|
|
TagSettings: map[string]string{},
|
|
Struct: structField.Struct,
|
|
IsForeignKey: structField.IsForeignKey,
|
|
}
|
|
|
|
if structField.Relationship != nil {
|
|
relationship := *structField.Relationship
|
|
clone.Relationship = &relationship
|
|
}
|
|
|
|
// copy the struct field tagSettings, they should be read-locked while they are copied
|
|
structField.tagSettingsLock.Lock()
|
|
defer structField.tagSettingsLock.Unlock()
|
|
for key, value := range structField.TagSettings {
|
|
clone.TagSettings[key] = value
|
|
}
|
|
|
|
return clone
|
|
}
|
|
|
|
// Relationship described the relationship between models
|
|
type Relationship struct {
|
|
Kind string
|
|
PolymorphicType string
|
|
PolymorphicDBName string
|
|
PolymorphicValue string
|
|
ForeignFieldNames []string
|
|
ForeignDBNames []string
|
|
AssociationForeignFieldNames []string
|
|
AssociationForeignDBNames []string
|
|
JoinTableHandler JoinTableHandlerInterface
|
|
}
|
|
|
|
func getForeignField(column string, fields []*StructField) *StructField {
|
|
for _, field := range fields {
|
|
if field.Name == column || field.DBName == column || field.DBName == ToColumnName(column) {
|
|
return field
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// GetModelStruct get value's model struct, relationships based on struct and tag definition
|
|
func (scope *Scope) GetModelStruct() *ModelStruct {
|
|
var modelStruct ModelStruct
|
|
// Scope value can't be nil
|
|
if scope.Value == nil {
|
|
return &modelStruct
|
|
}
|
|
|
|
reflectType := reflect.ValueOf(scope.Value).Type()
|
|
for reflectType.Kind() == reflect.Slice || reflectType.Kind() == reflect.Ptr {
|
|
reflectType = reflectType.Elem()
|
|
}
|
|
|
|
// Scope value need to be a struct
|
|
if reflectType.Kind() != reflect.Struct {
|
|
return &modelStruct
|
|
}
|
|
|
|
// Get Cached model struct
|
|
if value, ok := modelStructsMap.Load(reflectType); ok && value != nil {
|
|
return value.(*ModelStruct)
|
|
}
|
|
|
|
modelStruct.ModelType = reflectType
|
|
|
|
// Get all fields
|
|
for i := 0; i < reflectType.NumField(); i++ {
|
|
if fieldStruct := reflectType.Field(i); ast.IsExported(fieldStruct.Name) {
|
|
field := &StructField{
|
|
Struct: fieldStruct,
|
|
Name: fieldStruct.Name,
|
|
Names: []string{fieldStruct.Name},
|
|
Tag: fieldStruct.Tag,
|
|
TagSettings: parseTagSetting(fieldStruct.Tag),
|
|
}
|
|
|
|
// is ignored field
|
|
if _, ok := field.TagSettingsGet("-"); ok {
|
|
field.IsIgnored = true
|
|
} else {
|
|
if _, ok := field.TagSettingsGet("PRIMARY_KEY"); ok {
|
|
field.IsPrimaryKey = true
|
|
modelStruct.PrimaryFields = append(modelStruct.PrimaryFields, field)
|
|
}
|
|
|
|
if _, ok := field.TagSettingsGet("DEFAULT"); ok {
|
|
field.HasDefaultValue = true
|
|
}
|
|
|
|
if _, ok := field.TagSettingsGet("AUTO_INCREMENT"); ok && !field.IsPrimaryKey {
|
|
field.HasDefaultValue = true
|
|
}
|
|
|
|
indirectType := fieldStruct.Type
|
|
for indirectType.Kind() == reflect.Ptr {
|
|
indirectType = indirectType.Elem()
|
|
}
|
|
|
|
fieldValue := reflect.New(indirectType).Interface()
|
|
if _, isScanner := fieldValue.(sql.Scanner); isScanner {
|
|
// is scanner
|
|
field.IsScanner, field.IsNormal = true, true
|
|
if indirectType.Kind() == reflect.Struct {
|
|
for i := 0; i < indirectType.NumField(); i++ {
|
|
for key, value := range parseTagSetting(indirectType.Field(i).Tag) {
|
|
if _, ok := field.TagSettingsGet(key); !ok {
|
|
field.TagSettingsSet(key, value)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} else if _, isTime := fieldValue.(*time.Time); isTime {
|
|
// is time
|
|
field.IsNormal = true
|
|
} else if _, ok := field.TagSettingsGet("EMBEDDED"); ok || fieldStruct.Anonymous {
|
|
// is embedded struct
|
|
for _, subField := range scope.New(fieldValue).GetModelStruct().StructFields {
|
|
subField = subField.clone()
|
|
subField.Names = append([]string{fieldStruct.Name}, subField.Names...)
|
|
if prefix, ok := field.TagSettingsGet("EMBEDDED_PREFIX"); ok {
|
|
subField.DBName = prefix + subField.DBName
|
|
}
|
|
|
|
if subField.IsPrimaryKey {
|
|
if _, ok := subField.TagSettingsGet("PRIMARY_KEY"); ok {
|
|
modelStruct.PrimaryFields = append(modelStruct.PrimaryFields, subField)
|
|
} else {
|
|
subField.IsPrimaryKey = false
|
|
}
|
|
}
|
|
|
|
if subField.Relationship != nil && subField.Relationship.JoinTableHandler != nil {
|
|
if joinTableHandler, ok := subField.Relationship.JoinTableHandler.(*JoinTableHandler); ok {
|
|
newJoinTableHandler := &JoinTableHandler{}
|
|
newJoinTableHandler.Setup(subField.Relationship, joinTableHandler.TableName, reflectType, joinTableHandler.Destination.ModelType)
|
|
subField.Relationship.JoinTableHandler = newJoinTableHandler
|
|
}
|
|
}
|
|
|
|
modelStruct.StructFields = append(modelStruct.StructFields, subField)
|
|
}
|
|
continue
|
|
} else {
|
|
// build relationships
|
|
switch indirectType.Kind() {
|
|
case reflect.Slice:
|
|
defer func(field *StructField) {
|
|
var (
|
|
relationship = &Relationship{}
|
|
toScope = scope.New(reflect.New(field.Struct.Type).Interface())
|
|
foreignKeys []string
|
|
associationForeignKeys []string
|
|
elemType = field.Struct.Type
|
|
)
|
|
|
|
if foreignKey, _ := field.TagSettingsGet("FOREIGNKEY"); foreignKey != "" {
|
|
foreignKeys = strings.Split(foreignKey, ",")
|
|
}
|
|
|
|
if foreignKey, _ := field.TagSettingsGet("ASSOCIATION_FOREIGNKEY"); foreignKey != "" {
|
|
associationForeignKeys = strings.Split(foreignKey, ",")
|
|
} else if foreignKey, _ := field.TagSettingsGet("ASSOCIATIONFOREIGNKEY"); foreignKey != "" {
|
|
associationForeignKeys = strings.Split(foreignKey, ",")
|
|
}
|
|
|
|
for elemType.Kind() == reflect.Slice || elemType.Kind() == reflect.Ptr {
|
|
elemType = elemType.Elem()
|
|
}
|
|
|
|
if elemType.Kind() == reflect.Struct {
|
|
if many2many, _ := field.TagSettingsGet("MANY2MANY"); many2many != "" {
|
|
relationship.Kind = "many_to_many"
|
|
|
|
{ // Foreign Keys for Source
|
|
joinTableDBNames := []string{}
|
|
|
|
if foreignKey, _ := field.TagSettingsGet("JOINTABLE_FOREIGNKEY"); foreignKey != "" {
|
|
joinTableDBNames = strings.Split(foreignKey, ",")
|
|
}
|
|
|
|
// if no foreign keys defined with tag
|
|
if len(foreignKeys) == 0 {
|
|
for _, field := range modelStruct.PrimaryFields {
|
|
foreignKeys = append(foreignKeys, field.DBName)
|
|
}
|
|
}
|
|
|
|
for idx, foreignKey := range foreignKeys {
|
|
if foreignField := getForeignField(foreignKey, modelStruct.StructFields); foreignField != nil {
|
|
// source foreign keys (db names)
|
|
relationship.ForeignFieldNames = append(relationship.ForeignFieldNames, foreignField.DBName)
|
|
|
|
// setup join table foreign keys for source
|
|
if len(joinTableDBNames) > idx {
|
|
// if defined join table's foreign key
|
|
relationship.ForeignDBNames = append(relationship.ForeignDBNames, joinTableDBNames[idx])
|
|
} else {
|
|
defaultJointableForeignKey := ToColumnName(reflectType.Name()) + "_" + foreignField.DBName
|
|
relationship.ForeignDBNames = append(relationship.ForeignDBNames, defaultJointableForeignKey)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
{ // Foreign Keys for Association (Destination)
|
|
associationJoinTableDBNames := []string{}
|
|
|
|
if foreignKey, _ := field.TagSettingsGet("ASSOCIATION_JOINTABLE_FOREIGNKEY"); foreignKey != "" {
|
|
associationJoinTableDBNames = strings.Split(foreignKey, ",")
|
|
}
|
|
|
|
// if no association foreign keys defined with tag
|
|
if len(associationForeignKeys) == 0 {
|
|
for _, field := range toScope.PrimaryFields() {
|
|
associationForeignKeys = append(associationForeignKeys, field.DBName)
|
|
}
|
|
}
|
|
|
|
for idx, name := range associationForeignKeys {
|
|
if field, ok := toScope.FieldByName(name); ok {
|
|
// association foreign keys (db names)
|
|
relationship.AssociationForeignFieldNames = append(relationship.AssociationForeignFieldNames, field.DBName)
|
|
|
|
// setup join table foreign keys for association
|
|
if len(associationJoinTableDBNames) > idx {
|
|
relationship.AssociationForeignDBNames = append(relationship.AssociationForeignDBNames, associationJoinTableDBNames[idx])
|
|
} else {
|
|
// join table foreign keys for association
|
|
joinTableDBName := ToColumnName(elemType.Name()) + "_" + field.DBName
|
|
relationship.AssociationForeignDBNames = append(relationship.AssociationForeignDBNames, joinTableDBName)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
joinTableHandler := JoinTableHandler{}
|
|
joinTableHandler.Setup(relationship, ToTableName(many2many), reflectType, elemType)
|
|
relationship.JoinTableHandler = &joinTableHandler
|
|
field.Relationship = relationship
|
|
} else {
|
|
// User has many comments, associationType is User, comment use UserID as foreign key
|
|
var associationType = reflectType.Name()
|
|
var toFields = toScope.GetStructFields()
|
|
relationship.Kind = "has_many"
|
|
|
|
if polymorphic, _ := field.TagSettingsGet("POLYMORPHIC"); polymorphic != "" {
|
|
// Dog has many toys, tag polymorphic is Owner, then associationType is Owner
|
|
// Toy use OwnerID, OwnerType ('dogs') as foreign key
|
|
if polymorphicType := getForeignField(polymorphic+"Type", toFields); polymorphicType != nil {
|
|
associationType = polymorphic
|
|
relationship.PolymorphicType = polymorphicType.Name
|
|
relationship.PolymorphicDBName = polymorphicType.DBName
|
|
// if Dog has multiple set of toys set name of the set (instead of default 'dogs')
|
|
if value, ok := field.TagSettingsGet("POLYMORPHIC_VALUE"); ok {
|
|
relationship.PolymorphicValue = value
|
|
} else {
|
|
relationship.PolymorphicValue = scope.TableName()
|
|
}
|
|
polymorphicType.IsForeignKey = true
|
|
}
|
|
}
|
|
|
|
// if no foreign keys defined with tag
|
|
if len(foreignKeys) == 0 {
|
|
// if no association foreign keys defined with tag
|
|
if len(associationForeignKeys) == 0 {
|
|
for _, field := range modelStruct.PrimaryFields {
|
|
foreignKeys = append(foreignKeys, associationType+field.Name)
|
|
associationForeignKeys = append(associationForeignKeys, field.Name)
|
|
}
|
|
} else {
|
|
// generate foreign keys from defined association foreign keys
|
|
for _, scopeFieldName := range associationForeignKeys {
|
|
if foreignField := getForeignField(scopeFieldName, modelStruct.StructFields); foreignField != nil {
|
|
foreignKeys = append(foreignKeys, associationType+foreignField.Name)
|
|
associationForeignKeys = append(associationForeignKeys, foreignField.Name)
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
// generate association foreign keys from foreign keys
|
|
if len(associationForeignKeys) == 0 {
|
|
for _, foreignKey := range foreignKeys {
|
|
if strings.HasPrefix(foreignKey, associationType) {
|
|
associationForeignKey := strings.TrimPrefix(foreignKey, associationType)
|
|
if foreignField := getForeignField(associationForeignKey, modelStruct.StructFields); foreignField != nil {
|
|
associationForeignKeys = append(associationForeignKeys, associationForeignKey)
|
|
}
|
|
}
|
|
}
|
|
if len(associationForeignKeys) == 0 && len(foreignKeys) == 1 {
|
|
associationForeignKeys = []string{scope.PrimaryKey()}
|
|
}
|
|
} else if len(foreignKeys) != len(associationForeignKeys) {
|
|
scope.Err(errors.New("invalid foreign keys, should have same length"))
|
|
return
|
|
}
|
|
}
|
|
|
|
for idx, foreignKey := range foreignKeys {
|
|
if foreignField := getForeignField(foreignKey, toFields); foreignField != nil {
|
|
if associationField := getForeignField(associationForeignKeys[idx], modelStruct.StructFields); associationField != nil {
|
|
// source foreign keys
|
|
foreignField.IsForeignKey = true
|
|
relationship.AssociationForeignFieldNames = append(relationship.AssociationForeignFieldNames, associationField.Name)
|
|
relationship.AssociationForeignDBNames = append(relationship.AssociationForeignDBNames, associationField.DBName)
|
|
|
|
// association foreign keys
|
|
relationship.ForeignFieldNames = append(relationship.ForeignFieldNames, foreignField.Name)
|
|
relationship.ForeignDBNames = append(relationship.ForeignDBNames, foreignField.DBName)
|
|
}
|
|
}
|
|
}
|
|
|
|
if len(relationship.ForeignFieldNames) != 0 {
|
|
field.Relationship = relationship
|
|
}
|
|
}
|
|
} else {
|
|
field.IsNormal = true
|
|
}
|
|
}(field)
|
|
case reflect.Struct:
|
|
defer func(field *StructField) {
|
|
var (
|
|
// user has one profile, associationType is User, profile use UserID as foreign key
|
|
// user belongs to profile, associationType is Profile, user use ProfileID as foreign key
|
|
associationType = reflectType.Name()
|
|
relationship = &Relationship{}
|
|
toScope = scope.New(reflect.New(field.Struct.Type).Interface())
|
|
toFields = toScope.GetStructFields()
|
|
tagForeignKeys []string
|
|
tagAssociationForeignKeys []string
|
|
)
|
|
|
|
if foreignKey, _ := field.TagSettingsGet("FOREIGNKEY"); foreignKey != "" {
|
|
tagForeignKeys = strings.Split(foreignKey, ",")
|
|
}
|
|
|
|
if foreignKey, _ := field.TagSettingsGet("ASSOCIATION_FOREIGNKEY"); foreignKey != "" {
|
|
tagAssociationForeignKeys = strings.Split(foreignKey, ",")
|
|
} else if foreignKey, _ := field.TagSettingsGet("ASSOCIATIONFOREIGNKEY"); foreignKey != "" {
|
|
tagAssociationForeignKeys = strings.Split(foreignKey, ",")
|
|
}
|
|
|
|
if polymorphic, _ := field.TagSettingsGet("POLYMORPHIC"); polymorphic != "" {
|
|
// Cat has one toy, tag polymorphic is Owner, then associationType is Owner
|
|
// Toy use OwnerID, OwnerType ('cats') as foreign key
|
|
if polymorphicType := getForeignField(polymorphic+"Type", toFields); polymorphicType != nil {
|
|
associationType = polymorphic
|
|
relationship.PolymorphicType = polymorphicType.Name
|
|
relationship.PolymorphicDBName = polymorphicType.DBName
|
|
// if Cat has several different types of toys set name for each (instead of default 'cats')
|
|
if value, ok := field.TagSettingsGet("POLYMORPHIC_VALUE"); ok {
|
|
relationship.PolymorphicValue = value
|
|
} else {
|
|
relationship.PolymorphicValue = scope.TableName()
|
|
}
|
|
polymorphicType.IsForeignKey = true
|
|
}
|
|
}
|
|
|
|
// Has One
|
|
{
|
|
var foreignKeys = tagForeignKeys
|
|
var associationForeignKeys = tagAssociationForeignKeys
|
|
// if no foreign keys defined with tag
|
|
if len(foreignKeys) == 0 {
|
|
// if no association foreign keys defined with tag
|
|
if len(associationForeignKeys) == 0 {
|
|
for _, primaryField := range modelStruct.PrimaryFields {
|
|
foreignKeys = append(foreignKeys, associationType+primaryField.Name)
|
|
associationForeignKeys = append(associationForeignKeys, primaryField.Name)
|
|
}
|
|
} else {
|
|
// generate foreign keys form association foreign keys
|
|
for _, associationForeignKey := range tagAssociationForeignKeys {
|
|
if foreignField := getForeignField(associationForeignKey, modelStruct.StructFields); foreignField != nil {
|
|
foreignKeys = append(foreignKeys, associationType+foreignField.Name)
|
|
associationForeignKeys = append(associationForeignKeys, foreignField.Name)
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
// generate association foreign keys from foreign keys
|
|
if len(associationForeignKeys) == 0 {
|
|
for _, foreignKey := range foreignKeys {
|
|
if strings.HasPrefix(foreignKey, associationType) {
|
|
associationForeignKey := strings.TrimPrefix(foreignKey, associationType)
|
|
if foreignField := getForeignField(associationForeignKey, modelStruct.StructFields); foreignField != nil {
|
|
associationForeignKeys = append(associationForeignKeys, associationForeignKey)
|
|
}
|
|
}
|
|
}
|
|
if len(associationForeignKeys) == 0 && len(foreignKeys) == 1 {
|
|
associationForeignKeys = []string{scope.PrimaryKey()}
|
|
}
|
|
} else if len(foreignKeys) != len(associationForeignKeys) {
|
|
scope.Err(errors.New("invalid foreign keys, should have same length"))
|
|
return
|
|
}
|
|
}
|
|
|
|
for idx, foreignKey := range foreignKeys {
|
|
if foreignField := getForeignField(foreignKey, toFields); foreignField != nil {
|
|
if scopeField := getForeignField(associationForeignKeys[idx], modelStruct.StructFields); scopeField != nil {
|
|
foreignField.IsForeignKey = true
|
|
// source foreign keys
|
|
relationship.AssociationForeignFieldNames = append(relationship.AssociationForeignFieldNames, scopeField.Name)
|
|
relationship.AssociationForeignDBNames = append(relationship.AssociationForeignDBNames, scopeField.DBName)
|
|
|
|
// association foreign keys
|
|
relationship.ForeignFieldNames = append(relationship.ForeignFieldNames, foreignField.Name)
|
|
relationship.ForeignDBNames = append(relationship.ForeignDBNames, foreignField.DBName)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if len(relationship.ForeignFieldNames) != 0 {
|
|
relationship.Kind = "has_one"
|
|
field.Relationship = relationship
|
|
} else {
|
|
var foreignKeys = tagForeignKeys
|
|
var associationForeignKeys = tagAssociationForeignKeys
|
|
|
|
if len(foreignKeys) == 0 {
|
|
// generate foreign keys & association foreign keys
|
|
if len(associationForeignKeys) == 0 {
|
|
for _, primaryField := range toScope.PrimaryFields() {
|
|
foreignKeys = append(foreignKeys, field.Name+primaryField.Name)
|
|
associationForeignKeys = append(associationForeignKeys, primaryField.Name)
|
|
}
|
|
} else {
|
|
// generate foreign keys with association foreign keys
|
|
for _, associationForeignKey := range associationForeignKeys {
|
|
if foreignField := getForeignField(associationForeignKey, toFields); foreignField != nil {
|
|
foreignKeys = append(foreignKeys, field.Name+foreignField.Name)
|
|
associationForeignKeys = append(associationForeignKeys, foreignField.Name)
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
// generate foreign keys & association foreign keys
|
|
if len(associationForeignKeys) == 0 {
|
|
for _, foreignKey := range foreignKeys {
|
|
if strings.HasPrefix(foreignKey, field.Name) {
|
|
associationForeignKey := strings.TrimPrefix(foreignKey, field.Name)
|
|
if foreignField := getForeignField(associationForeignKey, toFields); foreignField != nil {
|
|
associationForeignKeys = append(associationForeignKeys, associationForeignKey)
|
|
}
|
|
}
|
|
}
|
|
if len(associationForeignKeys) == 0 && len(foreignKeys) == 1 {
|
|
associationForeignKeys = []string{toScope.PrimaryKey()}
|
|
}
|
|
} else if len(foreignKeys) != len(associationForeignKeys) {
|
|
scope.Err(errors.New("invalid foreign keys, should have same length"))
|
|
return
|
|
}
|
|
}
|
|
|
|
for idx, foreignKey := range foreignKeys {
|
|
if foreignField := getForeignField(foreignKey, modelStruct.StructFields); foreignField != nil {
|
|
if associationField := getForeignField(associationForeignKeys[idx], toFields); associationField != nil {
|
|
foreignField.IsForeignKey = true
|
|
|
|
// association foreign keys
|
|
relationship.AssociationForeignFieldNames = append(relationship.AssociationForeignFieldNames, associationField.Name)
|
|
relationship.AssociationForeignDBNames = append(relationship.AssociationForeignDBNames, associationField.DBName)
|
|
|
|
// source foreign keys
|
|
relationship.ForeignFieldNames = append(relationship.ForeignFieldNames, foreignField.Name)
|
|
relationship.ForeignDBNames = append(relationship.ForeignDBNames, foreignField.DBName)
|
|
}
|
|
}
|
|
}
|
|
|
|
if len(relationship.ForeignFieldNames) != 0 {
|
|
relationship.Kind = "belongs_to"
|
|
field.Relationship = relationship
|
|
}
|
|
}
|
|
}(field)
|
|
default:
|
|
field.IsNormal = true
|
|
}
|
|
}
|
|
}
|
|
|
|
// Even it is ignored, also possible to decode db value into the field
|
|
if value, ok := field.TagSettingsGet("COLUMN"); ok {
|
|
field.DBName = value
|
|
} else {
|
|
field.DBName = ToColumnName(fieldStruct.Name)
|
|
}
|
|
|
|
modelStruct.StructFields = append(modelStruct.StructFields, field)
|
|
}
|
|
}
|
|
|
|
if len(modelStruct.PrimaryFields) == 0 {
|
|
if field := getForeignField("id", modelStruct.StructFields); field != nil {
|
|
field.IsPrimaryKey = true
|
|
modelStruct.PrimaryFields = append(modelStruct.PrimaryFields, field)
|
|
}
|
|
}
|
|
|
|
modelStructsMap.Store(reflectType, &modelStruct)
|
|
|
|
return &modelStruct
|
|
}
|
|
|
|
// GetStructFields get model's field structs
|
|
func (scope *Scope) GetStructFields() (fields []*StructField) {
|
|
return scope.GetModelStruct().StructFields
|
|
}
|
|
|
|
func parseTagSetting(tags reflect.StructTag) map[string]string {
|
|
setting := map[string]string{}
|
|
for _, str := range []string{tags.Get("sql"), tags.Get("gorm")} {
|
|
tags := strings.Split(str, ";")
|
|
for _, value := range tags {
|
|
v := strings.Split(value, ":")
|
|
k := strings.TrimSpace(strings.ToUpper(v[0]))
|
|
if len(v) >= 2 {
|
|
setting[k] = strings.Join(v[1:], ":")
|
|
} else {
|
|
setting[k] = k
|
|
}
|
|
}
|
|
}
|
|
return setting
|
|
}
|