949 lines
22 KiB
Go
949 lines
22 KiB
Go
package schema
|
|
|
|
import (
|
|
"database/sql"
|
|
"fmt"
|
|
"reflect"
|
|
"strings"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/jinzhu/inflection"
|
|
|
|
"github.com/uptrace/bun/internal"
|
|
"github.com/uptrace/bun/internal/tagparser"
|
|
)
|
|
|
|
const (
|
|
beforeScanHookFlag internal.Flag = 1 << iota
|
|
afterScanHookFlag
|
|
)
|
|
|
|
var (
|
|
baseModelType = reflect.TypeOf((*BaseModel)(nil)).Elem()
|
|
tableNameInflector = inflection.Plural
|
|
)
|
|
|
|
type BaseModel struct{}
|
|
|
|
// SetTableNameInflector overrides the default func that pluralizes
|
|
// model name to get table name, e.g. my_article becomes my_articles.
|
|
func SetTableNameInflector(fn func(string) string) {
|
|
tableNameInflector = fn
|
|
}
|
|
|
|
// Table represents a SQL table created from Go struct.
|
|
type Table struct {
|
|
dialect Dialect
|
|
|
|
Type reflect.Type
|
|
ZeroValue reflect.Value // reflect.Struct
|
|
ZeroIface interface{} // struct pointer
|
|
|
|
TypeName string
|
|
ModelName string
|
|
|
|
Name string
|
|
SQLName Safe
|
|
SQLNameForSelects Safe
|
|
Alias string
|
|
SQLAlias Safe
|
|
|
|
Fields []*Field // PKs + DataFields
|
|
PKs []*Field
|
|
DataFields []*Field
|
|
|
|
fieldsMapMu sync.RWMutex
|
|
FieldMap map[string]*Field
|
|
|
|
Relations map[string]*Relation
|
|
Unique map[string][]*Field
|
|
|
|
SoftDeleteField *Field
|
|
UpdateSoftDeleteField func(fv reflect.Value) error
|
|
|
|
allFields []*Field // read only
|
|
skippedFields []*Field
|
|
|
|
flags internal.Flag
|
|
}
|
|
|
|
func newTable(dialect Dialect, typ reflect.Type) *Table {
|
|
t := new(Table)
|
|
t.dialect = dialect
|
|
t.Type = typ
|
|
t.ZeroValue = reflect.New(t.Type).Elem()
|
|
t.ZeroIface = reflect.New(t.Type).Interface()
|
|
t.TypeName = internal.ToExported(t.Type.Name())
|
|
t.ModelName = internal.Underscore(t.Type.Name())
|
|
tableName := tableNameInflector(t.ModelName)
|
|
t.setName(tableName)
|
|
t.Alias = t.ModelName
|
|
t.SQLAlias = t.quoteIdent(t.ModelName)
|
|
|
|
hooks := []struct {
|
|
typ reflect.Type
|
|
flag internal.Flag
|
|
}{
|
|
{beforeScanHookType, beforeScanHookFlag},
|
|
{afterScanHookType, afterScanHookFlag},
|
|
}
|
|
|
|
typ = reflect.PtrTo(t.Type)
|
|
for _, hook := range hooks {
|
|
if typ.Implements(hook.typ) {
|
|
t.flags = t.flags.Set(hook.flag)
|
|
}
|
|
}
|
|
|
|
return t
|
|
}
|
|
|
|
func (t *Table) init1() {
|
|
t.initFields()
|
|
}
|
|
|
|
func (t *Table) init2() {
|
|
t.initInlines()
|
|
t.initRelations()
|
|
t.skippedFields = nil
|
|
}
|
|
|
|
func (t *Table) setName(name string) {
|
|
t.Name = name
|
|
t.SQLName = t.quoteIdent(name)
|
|
t.SQLNameForSelects = t.quoteIdent(name)
|
|
if t.SQLAlias == "" {
|
|
t.Alias = name
|
|
t.SQLAlias = t.quoteIdent(name)
|
|
}
|
|
}
|
|
|
|
func (t *Table) String() string {
|
|
return "model=" + t.TypeName
|
|
}
|
|
|
|
func (t *Table) CheckPKs() error {
|
|
if len(t.PKs) == 0 {
|
|
return fmt.Errorf("bun: %s does not have primary keys", t)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (t *Table) addField(field *Field) {
|
|
t.Fields = append(t.Fields, field)
|
|
if field.IsPK {
|
|
t.PKs = append(t.PKs, field)
|
|
} else {
|
|
t.DataFields = append(t.DataFields, field)
|
|
}
|
|
t.FieldMap[field.Name] = field
|
|
}
|
|
|
|
func (t *Table) removeField(field *Field) {
|
|
t.Fields = removeField(t.Fields, field)
|
|
if field.IsPK {
|
|
t.PKs = removeField(t.PKs, field)
|
|
} else {
|
|
t.DataFields = removeField(t.DataFields, field)
|
|
}
|
|
delete(t.FieldMap, field.Name)
|
|
}
|
|
|
|
func (t *Table) fieldWithLock(name string) *Field {
|
|
t.fieldsMapMu.RLock()
|
|
field := t.FieldMap[name]
|
|
t.fieldsMapMu.RUnlock()
|
|
return field
|
|
}
|
|
|
|
func (t *Table) HasField(name string) bool {
|
|
_, ok := t.FieldMap[name]
|
|
return ok
|
|
}
|
|
|
|
func (t *Table) Field(name string) (*Field, error) {
|
|
field, ok := t.FieldMap[name]
|
|
if !ok {
|
|
return nil, fmt.Errorf("bun: %s does not have column=%s", t, name)
|
|
}
|
|
return field, nil
|
|
}
|
|
|
|
func (t *Table) fieldByGoName(name string) *Field {
|
|
for _, f := range t.allFields {
|
|
if f.GoName == name {
|
|
return f
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (t *Table) initFields() {
|
|
t.Fields = make([]*Field, 0, t.Type.NumField())
|
|
t.FieldMap = make(map[string]*Field, t.Type.NumField())
|
|
t.addFields(t.Type, nil)
|
|
|
|
if len(t.PKs) > 0 {
|
|
return
|
|
}
|
|
for _, name := range []string{"id", "uuid", "pk_" + t.ModelName} {
|
|
if field, ok := t.FieldMap[name]; ok {
|
|
field.markAsPK()
|
|
t.PKs = []*Field{field}
|
|
t.DataFields = removeField(t.DataFields, field)
|
|
break
|
|
}
|
|
}
|
|
if len(t.PKs) == 1 {
|
|
switch t.PKs[0].IndirectType.Kind() {
|
|
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
|
|
reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
|
|
t.PKs[0].AutoIncrement = true
|
|
}
|
|
}
|
|
}
|
|
|
|
func (t *Table) addFields(typ reflect.Type, baseIndex []int) {
|
|
for i := 0; i < typ.NumField(); i++ {
|
|
f := typ.Field(i)
|
|
|
|
// Make a copy so slice is not shared between fields.
|
|
index := make([]int, len(baseIndex))
|
|
copy(index, baseIndex)
|
|
|
|
if f.Anonymous {
|
|
if f.Tag.Get("bun") == "-" {
|
|
continue
|
|
}
|
|
if f.Name == "BaseModel" && f.Type == baseModelType {
|
|
if len(index) == 0 {
|
|
t.processBaseModelField(f)
|
|
}
|
|
continue
|
|
}
|
|
|
|
fieldType := indirectType(f.Type)
|
|
if fieldType.Kind() != reflect.Struct {
|
|
continue
|
|
}
|
|
t.addFields(fieldType, append(index, f.Index...))
|
|
|
|
tag := tagparser.Parse(f.Tag.Get("bun"))
|
|
if _, inherit := tag.Options["inherit"]; inherit {
|
|
embeddedTable := t.dialect.Tables().Ref(fieldType)
|
|
t.TypeName = embeddedTable.TypeName
|
|
t.SQLName = embeddedTable.SQLName
|
|
t.SQLNameForSelects = embeddedTable.SQLNameForSelects
|
|
t.Alias = embeddedTable.Alias
|
|
t.SQLAlias = embeddedTable.SQLAlias
|
|
t.ModelName = embeddedTable.ModelName
|
|
}
|
|
|
|
continue
|
|
}
|
|
|
|
field := t.newField(f, index)
|
|
if field != nil {
|
|
t.addField(field)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (t *Table) processBaseModelField(f reflect.StructField) {
|
|
tag := tagparser.Parse(f.Tag.Get("bun"))
|
|
|
|
if isKnownTableOption(tag.Name) {
|
|
internal.Warn.Printf(
|
|
"%s.%s tag name %q is also an option name; is it a mistake?",
|
|
t.TypeName, f.Name, tag.Name,
|
|
)
|
|
}
|
|
|
|
for name := range tag.Options {
|
|
if !isKnownTableOption(name) {
|
|
internal.Warn.Printf("%s.%s has unknown tag option: %q", t.TypeName, f.Name, name)
|
|
}
|
|
}
|
|
|
|
if tag.Name != "" {
|
|
t.setName(tag.Name)
|
|
}
|
|
|
|
if s, ok := tag.Options["select"]; ok {
|
|
t.SQLNameForSelects = t.quoteTableName(s)
|
|
}
|
|
|
|
if s, ok := tag.Options["alias"]; ok {
|
|
t.Alias = s
|
|
t.SQLAlias = t.quoteIdent(s)
|
|
}
|
|
}
|
|
|
|
//nolint
|
|
func (t *Table) newField(f reflect.StructField, index []int) *Field {
|
|
tag := tagparser.Parse(f.Tag.Get("bun"))
|
|
|
|
if f.PkgPath != "" {
|
|
return nil
|
|
}
|
|
|
|
sqlName := internal.Underscore(f.Name)
|
|
|
|
if tag.Name != sqlName && isKnownFieldOption(tag.Name) {
|
|
internal.Warn.Printf(
|
|
"%s.%s tag name %q is also an option name; is it a mistake?",
|
|
t.TypeName, f.Name, tag.Name,
|
|
)
|
|
}
|
|
|
|
for name := range tag.Options {
|
|
if !isKnownFieldOption(name) {
|
|
internal.Warn.Printf("%s.%s has unknown tag option: %q", t.TypeName, f.Name, name)
|
|
}
|
|
}
|
|
|
|
skip := tag.Name == "-"
|
|
if !skip && tag.Name != "" {
|
|
sqlName = tag.Name
|
|
}
|
|
|
|
index = append(index, f.Index...)
|
|
if field := t.fieldWithLock(sqlName); field != nil {
|
|
if indexEqual(field.Index, index) {
|
|
return field
|
|
}
|
|
t.removeField(field)
|
|
}
|
|
|
|
field := &Field{
|
|
StructField: f,
|
|
|
|
Tag: tag,
|
|
IndirectType: indirectType(f.Type),
|
|
Index: index,
|
|
|
|
Name: sqlName,
|
|
GoName: f.Name,
|
|
SQLName: t.quoteIdent(sqlName),
|
|
}
|
|
|
|
field.NotNull = tag.HasOption("notnull")
|
|
field.NullZero = tag.HasOption("nullzero")
|
|
field.AutoIncrement = tag.HasOption("autoincrement")
|
|
if tag.HasOption("pk") {
|
|
field.markAsPK()
|
|
}
|
|
if tag.HasOption("allowzero") {
|
|
if tag.HasOption("nullzero") {
|
|
internal.Warn.Printf(
|
|
"%s.%s: nullzero and allowzero options are mutually exclusive",
|
|
t.TypeName, f.Name,
|
|
)
|
|
}
|
|
field.NullZero = false
|
|
}
|
|
|
|
if v, ok := tag.Options["unique"]; ok {
|
|
// Split the value by comma, this will allow multiple names to be specified.
|
|
// We can use this to create multiple named unique constraints where a single column
|
|
// might be included in multiple constraints.
|
|
for _, uniqueName := range strings.Split(v, ",") {
|
|
if t.Unique == nil {
|
|
t.Unique = make(map[string][]*Field)
|
|
}
|
|
t.Unique[uniqueName] = append(t.Unique[uniqueName], field)
|
|
}
|
|
}
|
|
if s, ok := tag.Options["default"]; ok {
|
|
field.SQLDefault = s
|
|
}
|
|
if s, ok := field.Tag.Options["type"]; ok {
|
|
field.UserSQLType = s
|
|
}
|
|
field.DiscoveredSQLType = DiscoverSQLType(field.IndirectType)
|
|
field.Append = t.dialect.FieldAppender(field)
|
|
field.Scan = FieldScanner(t.dialect, field)
|
|
field.IsZero = FieldZeroChecker(field)
|
|
|
|
if v, ok := tag.Options["alt"]; ok {
|
|
t.FieldMap[v] = field
|
|
}
|
|
|
|
t.allFields = append(t.allFields, field)
|
|
if skip {
|
|
t.skippedFields = append(t.skippedFields, field)
|
|
t.FieldMap[field.Name] = field
|
|
return nil
|
|
}
|
|
|
|
if _, ok := tag.Options["soft_delete"]; ok {
|
|
field.NullZero = true
|
|
t.SoftDeleteField = field
|
|
t.UpdateSoftDeleteField = softDeleteFieldUpdater(field)
|
|
}
|
|
|
|
return field
|
|
}
|
|
|
|
func (t *Table) initInlines() {
|
|
for _, f := range t.skippedFields {
|
|
if f.IndirectType.Kind() == reflect.Struct {
|
|
t.inlineFields(f, nil)
|
|
}
|
|
}
|
|
}
|
|
|
|
//---------------------------------------------------------------------------------------
|
|
|
|
func (t *Table) initRelations() {
|
|
for i := 0; i < len(t.Fields); {
|
|
f := t.Fields[i]
|
|
if t.tryRelation(f) {
|
|
t.Fields = removeField(t.Fields, f)
|
|
t.DataFields = removeField(t.DataFields, f)
|
|
} else {
|
|
i++
|
|
}
|
|
|
|
if f.IndirectType.Kind() == reflect.Struct {
|
|
t.inlineFields(f, nil)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (t *Table) tryRelation(field *Field) bool {
|
|
if rel, ok := field.Tag.Options["rel"]; ok {
|
|
t.initRelation(field, rel)
|
|
return true
|
|
}
|
|
if field.Tag.HasOption("m2m") {
|
|
t.addRelation(t.m2mRelation(field))
|
|
return true
|
|
}
|
|
|
|
if field.Tag.HasOption("join") {
|
|
internal.Warn.Printf(
|
|
`%s.%s option "join" requires a relation type`,
|
|
t.TypeName, field.GoName,
|
|
)
|
|
}
|
|
|
|
return false
|
|
}
|
|
|
|
func (t *Table) initRelation(field *Field, rel string) {
|
|
switch rel {
|
|
case "belongs-to":
|
|
t.addRelation(t.belongsToRelation(field))
|
|
case "has-one":
|
|
t.addRelation(t.hasOneRelation(field))
|
|
case "has-many":
|
|
t.addRelation(t.hasManyRelation(field))
|
|
default:
|
|
panic(fmt.Errorf("bun: unknown relation=%s on field=%s", rel, field.GoName))
|
|
}
|
|
}
|
|
|
|
func (t *Table) addRelation(rel *Relation) {
|
|
if t.Relations == nil {
|
|
t.Relations = make(map[string]*Relation)
|
|
}
|
|
_, ok := t.Relations[rel.Field.GoName]
|
|
if ok {
|
|
panic(fmt.Errorf("%s already has %s", t, rel))
|
|
}
|
|
t.Relations[rel.Field.GoName] = rel
|
|
}
|
|
|
|
func (t *Table) belongsToRelation(field *Field) *Relation {
|
|
joinTable := t.dialect.Tables().Ref(field.IndirectType)
|
|
if err := joinTable.CheckPKs(); err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
rel := &Relation{
|
|
Type: HasOneRelation,
|
|
Field: field,
|
|
JoinTable: joinTable,
|
|
}
|
|
|
|
if join, ok := field.Tag.Options["join"]; ok {
|
|
baseColumns, joinColumns := parseRelationJoin(join)
|
|
for i, baseColumn := range baseColumns {
|
|
joinColumn := joinColumns[i]
|
|
|
|
if f := t.fieldWithLock(baseColumn); f != nil {
|
|
rel.BaseFields = append(rel.BaseFields, f)
|
|
} else {
|
|
panic(fmt.Errorf(
|
|
"bun: %s belongs-to %s: %s must have column %s",
|
|
t.TypeName, field.GoName, t.TypeName, baseColumn,
|
|
))
|
|
}
|
|
|
|
if f := joinTable.fieldWithLock(joinColumn); f != nil {
|
|
rel.JoinFields = append(rel.JoinFields, f)
|
|
} else {
|
|
panic(fmt.Errorf(
|
|
"bun: %s belongs-to %s: %s must have column %s",
|
|
t.TypeName, field.GoName, t.TypeName, baseColumn,
|
|
))
|
|
}
|
|
}
|
|
return rel
|
|
}
|
|
|
|
rel.JoinFields = joinTable.PKs
|
|
fkPrefix := internal.Underscore(field.GoName) + "_"
|
|
for _, joinPK := range joinTable.PKs {
|
|
fkName := fkPrefix + joinPK.Name
|
|
if fk := t.fieldWithLock(fkName); fk != nil {
|
|
rel.BaseFields = append(rel.BaseFields, fk)
|
|
continue
|
|
}
|
|
|
|
if fk := t.fieldWithLock(joinPK.Name); fk != nil {
|
|
rel.BaseFields = append(rel.BaseFields, fk)
|
|
continue
|
|
}
|
|
|
|
panic(fmt.Errorf(
|
|
"bun: %s belongs-to %s: %s must have column %s "+
|
|
"(to override, use join:base_column=join_column tag on %s field)",
|
|
t.TypeName, field.GoName, t.TypeName, fkName, field.GoName,
|
|
))
|
|
}
|
|
return rel
|
|
}
|
|
|
|
func (t *Table) hasOneRelation(field *Field) *Relation {
|
|
if err := t.CheckPKs(); err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
joinTable := t.dialect.Tables().Ref(field.IndirectType)
|
|
rel := &Relation{
|
|
Type: BelongsToRelation,
|
|
Field: field,
|
|
JoinTable: joinTable,
|
|
}
|
|
|
|
if join, ok := field.Tag.Options["join"]; ok {
|
|
baseColumns, joinColumns := parseRelationJoin(join)
|
|
for i, baseColumn := range baseColumns {
|
|
if f := t.fieldWithLock(baseColumn); f != nil {
|
|
rel.BaseFields = append(rel.BaseFields, f)
|
|
} else {
|
|
panic(fmt.Errorf(
|
|
"bun: %s has-one %s: %s must have column %s",
|
|
field.GoName, t.TypeName, joinTable.TypeName, baseColumn,
|
|
))
|
|
}
|
|
|
|
joinColumn := joinColumns[i]
|
|
if f := joinTable.fieldWithLock(joinColumn); f != nil {
|
|
rel.JoinFields = append(rel.JoinFields, f)
|
|
} else {
|
|
panic(fmt.Errorf(
|
|
"bun: %s has-one %s: %s must have column %s",
|
|
field.GoName, t.TypeName, joinTable.TypeName, baseColumn,
|
|
))
|
|
}
|
|
}
|
|
return rel
|
|
}
|
|
|
|
rel.BaseFields = t.PKs
|
|
fkPrefix := internal.Underscore(t.ModelName) + "_"
|
|
for _, pk := range t.PKs {
|
|
fkName := fkPrefix + pk.Name
|
|
if f := joinTable.fieldWithLock(fkName); f != nil {
|
|
rel.JoinFields = append(rel.JoinFields, f)
|
|
continue
|
|
}
|
|
|
|
if f := joinTable.fieldWithLock(pk.Name); f != nil {
|
|
rel.JoinFields = append(rel.JoinFields, f)
|
|
continue
|
|
}
|
|
|
|
panic(fmt.Errorf(
|
|
"bun: %s has-one %s: %s must have column %s "+
|
|
"(to override, use join:base_column=join_column tag on %s field)",
|
|
field.GoName, t.TypeName, joinTable.TypeName, fkName, field.GoName,
|
|
))
|
|
}
|
|
return rel
|
|
}
|
|
|
|
func (t *Table) hasManyRelation(field *Field) *Relation {
|
|
if err := t.CheckPKs(); err != nil {
|
|
panic(err)
|
|
}
|
|
if field.IndirectType.Kind() != reflect.Slice {
|
|
panic(fmt.Errorf(
|
|
"bun: %s.%s has-many relation requires slice, got %q",
|
|
t.TypeName, field.GoName, field.IndirectType.Kind(),
|
|
))
|
|
}
|
|
|
|
joinTable := t.dialect.Tables().Ref(indirectType(field.IndirectType.Elem()))
|
|
polymorphicValue, isPolymorphic := field.Tag.Options["polymorphic"]
|
|
rel := &Relation{
|
|
Type: HasManyRelation,
|
|
Field: field,
|
|
JoinTable: joinTable,
|
|
}
|
|
var polymorphicColumn string
|
|
|
|
if join, ok := field.Tag.Options["join"]; ok {
|
|
baseColumns, joinColumns := parseRelationJoin(join)
|
|
for i, baseColumn := range baseColumns {
|
|
joinColumn := joinColumns[i]
|
|
|
|
if isPolymorphic && baseColumn == "type" {
|
|
polymorphicColumn = joinColumn
|
|
continue
|
|
}
|
|
|
|
if f := t.fieldWithLock(baseColumn); f != nil {
|
|
rel.BaseFields = append(rel.BaseFields, f)
|
|
} else {
|
|
panic(fmt.Errorf(
|
|
"bun: %s has-one %s: %s must have column %s",
|
|
t.TypeName, field.GoName, t.TypeName, baseColumn,
|
|
))
|
|
}
|
|
|
|
if f := joinTable.fieldWithLock(joinColumn); f != nil {
|
|
rel.JoinFields = append(rel.JoinFields, f)
|
|
} else {
|
|
panic(fmt.Errorf(
|
|
"bun: %s has-one %s: %s must have column %s",
|
|
t.TypeName, field.GoName, t.TypeName, baseColumn,
|
|
))
|
|
}
|
|
}
|
|
} else {
|
|
rel.BaseFields = t.PKs
|
|
fkPrefix := internal.Underscore(t.ModelName) + "_"
|
|
if isPolymorphic {
|
|
polymorphicColumn = fkPrefix + "type"
|
|
}
|
|
|
|
for _, pk := range t.PKs {
|
|
joinColumn := fkPrefix + pk.Name
|
|
if fk := joinTable.fieldWithLock(joinColumn); fk != nil {
|
|
rel.JoinFields = append(rel.JoinFields, fk)
|
|
continue
|
|
}
|
|
|
|
if fk := joinTable.fieldWithLock(pk.Name); fk != nil {
|
|
rel.JoinFields = append(rel.JoinFields, fk)
|
|
continue
|
|
}
|
|
|
|
panic(fmt.Errorf(
|
|
"bun: %s has-many %s: %s must have column %s "+
|
|
"(to override, use join:base_column=join_column tag on the field %s)",
|
|
t.TypeName, field.GoName, joinTable.TypeName, joinColumn, field.GoName,
|
|
))
|
|
}
|
|
}
|
|
|
|
if isPolymorphic {
|
|
rel.PolymorphicField = joinTable.fieldWithLock(polymorphicColumn)
|
|
if rel.PolymorphicField == nil {
|
|
panic(fmt.Errorf(
|
|
"bun: %s has-many %s: %s must have polymorphic column %s",
|
|
t.TypeName, field.GoName, joinTable.TypeName, polymorphicColumn,
|
|
))
|
|
}
|
|
|
|
if polymorphicValue == "" {
|
|
polymorphicValue = t.ModelName
|
|
}
|
|
rel.PolymorphicValue = polymorphicValue
|
|
}
|
|
|
|
return rel
|
|
}
|
|
|
|
func (t *Table) m2mRelation(field *Field) *Relation {
|
|
if field.IndirectType.Kind() != reflect.Slice {
|
|
panic(fmt.Errorf(
|
|
"bun: %s.%s m2m relation requires slice, got %q",
|
|
t.TypeName, field.GoName, field.IndirectType.Kind(),
|
|
))
|
|
}
|
|
joinTable := t.dialect.Tables().Ref(indirectType(field.IndirectType.Elem()))
|
|
|
|
if err := t.CheckPKs(); err != nil {
|
|
panic(err)
|
|
}
|
|
if err := joinTable.CheckPKs(); err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
m2mTableName, ok := field.Tag.Options["m2m"]
|
|
if !ok {
|
|
panic(fmt.Errorf("bun: %s must have m2m tag option", field.GoName))
|
|
}
|
|
|
|
m2mTable := t.dialect.Tables().ByName(m2mTableName)
|
|
if m2mTable == nil {
|
|
panic(fmt.Errorf(
|
|
"bun: can't find m2m %s table (use db.RegisterModel)",
|
|
m2mTableName,
|
|
))
|
|
}
|
|
|
|
rel := &Relation{
|
|
Type: ManyToManyRelation,
|
|
Field: field,
|
|
JoinTable: joinTable,
|
|
M2MTable: m2mTable,
|
|
}
|
|
var leftColumn, rightColumn string
|
|
|
|
if join, ok := field.Tag.Options["join"]; ok {
|
|
left, right := parseRelationJoin(join)
|
|
leftColumn = left[0]
|
|
rightColumn = right[0]
|
|
} else {
|
|
leftColumn = t.TypeName
|
|
rightColumn = joinTable.TypeName
|
|
}
|
|
|
|
leftField := m2mTable.fieldByGoName(leftColumn)
|
|
if leftField == nil {
|
|
panic(fmt.Errorf(
|
|
"bun: %s many-to-many %s: %s must have field %s "+
|
|
"(to override, use tag join:LeftField=RightField on field %s.%s",
|
|
t.TypeName, field.GoName, m2mTable.TypeName, leftColumn, t.TypeName, field.GoName,
|
|
))
|
|
}
|
|
|
|
rightField := m2mTable.fieldByGoName(rightColumn)
|
|
if rightField == nil {
|
|
panic(fmt.Errorf(
|
|
"bun: %s many-to-many %s: %s must have field %s "+
|
|
"(to override, use tag join:LeftField=RightField on field %s.%s",
|
|
t.TypeName, field.GoName, m2mTable.TypeName, rightColumn, t.TypeName, field.GoName,
|
|
))
|
|
}
|
|
|
|
leftRel := m2mTable.belongsToRelation(leftField)
|
|
rel.BaseFields = leftRel.JoinFields
|
|
rel.M2MBaseFields = leftRel.BaseFields
|
|
|
|
rightRel := m2mTable.belongsToRelation(rightField)
|
|
rel.JoinFields = rightRel.JoinFields
|
|
rel.M2MJoinFields = rightRel.BaseFields
|
|
|
|
return rel
|
|
}
|
|
|
|
func (t *Table) inlineFields(field *Field, path map[reflect.Type]struct{}) {
|
|
if path == nil {
|
|
path = map[reflect.Type]struct{}{
|
|
t.Type: {},
|
|
}
|
|
}
|
|
|
|
if _, ok := path[field.IndirectType]; ok {
|
|
return
|
|
}
|
|
path[field.IndirectType] = struct{}{}
|
|
|
|
joinTable := t.dialect.Tables().Ref(field.IndirectType)
|
|
for _, f := range joinTable.allFields {
|
|
f = f.Clone()
|
|
f.GoName = field.GoName + "_" + f.GoName
|
|
f.Name = field.Name + "__" + f.Name
|
|
f.SQLName = t.quoteIdent(f.Name)
|
|
f.Index = appendNew(field.Index, f.Index...)
|
|
|
|
t.fieldsMapMu.Lock()
|
|
if _, ok := t.FieldMap[f.Name]; !ok {
|
|
t.FieldMap[f.Name] = f
|
|
}
|
|
t.fieldsMapMu.Unlock()
|
|
|
|
if f.IndirectType.Kind() != reflect.Struct {
|
|
continue
|
|
}
|
|
|
|
if _, ok := path[f.IndirectType]; !ok {
|
|
t.inlineFields(f, path)
|
|
}
|
|
}
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
|
|
func (t *Table) Dialect() Dialect { return t.dialect }
|
|
|
|
//------------------------------------------------------------------------------
|
|
|
|
func (t *Table) HasBeforeScanHook() bool { return t.flags.Has(beforeScanHookFlag) }
|
|
func (t *Table) HasAfterScanHook() bool { return t.flags.Has(afterScanHookFlag) }
|
|
|
|
//------------------------------------------------------------------------------
|
|
|
|
func (t *Table) AppendNamedArg(
|
|
fmter Formatter, b []byte, name string, strct reflect.Value,
|
|
) ([]byte, bool) {
|
|
if field, ok := t.FieldMap[name]; ok {
|
|
return fmter.appendArg(b, field.Value(strct).Interface()), true
|
|
}
|
|
return b, false
|
|
}
|
|
|
|
func (t *Table) quoteTableName(s string) Safe {
|
|
// Don't quote if table name contains placeholder (?) or parentheses.
|
|
if strings.IndexByte(s, '?') >= 0 ||
|
|
strings.IndexByte(s, '(') >= 0 ||
|
|
strings.IndexByte(s, ')') >= 0 {
|
|
return Safe(s)
|
|
}
|
|
return t.quoteIdent(s)
|
|
}
|
|
|
|
func (t *Table) quoteIdent(s string) Safe {
|
|
return Safe(NewFormatter(t.dialect).AppendIdent(nil, s))
|
|
}
|
|
|
|
func appendNew(dst []int, src ...int) []int {
|
|
cp := make([]int, len(dst)+len(src))
|
|
copy(cp, dst)
|
|
copy(cp[len(dst):], src)
|
|
return cp
|
|
}
|
|
|
|
func isKnownTableOption(name string) bool {
|
|
switch name {
|
|
case "alias", "select":
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
func isKnownFieldOption(name string) bool {
|
|
switch name {
|
|
case "alias",
|
|
"type",
|
|
"array",
|
|
"hstore",
|
|
"composite",
|
|
"json_use_number",
|
|
"msgpack",
|
|
"notnull",
|
|
"nullzero",
|
|
"allowzero",
|
|
"default",
|
|
"unique",
|
|
"soft_delete",
|
|
|
|
"pk",
|
|
"autoincrement",
|
|
"rel",
|
|
"join",
|
|
"m2m",
|
|
"polymorphic":
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
func removeField(fields []*Field, field *Field) []*Field {
|
|
for i, f := range fields {
|
|
if f == field {
|
|
return append(fields[:i], fields[i+1:]...)
|
|
}
|
|
}
|
|
return fields
|
|
}
|
|
|
|
func parseRelationJoin(join string) ([]string, []string) {
|
|
ss := strings.Split(join, ",")
|
|
baseColumns := make([]string, len(ss))
|
|
joinColumns := make([]string, len(ss))
|
|
for i, s := range ss {
|
|
ss := strings.Split(strings.TrimSpace(s), "=")
|
|
if len(ss) != 2 {
|
|
panic(fmt.Errorf("can't parse relation join: %q", join))
|
|
}
|
|
baseColumns[i] = ss[0]
|
|
joinColumns[i] = ss[1]
|
|
}
|
|
return baseColumns, joinColumns
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
|
|
func softDeleteFieldUpdater(field *Field) func(fv reflect.Value) error {
|
|
typ := field.StructField.Type
|
|
|
|
switch typ {
|
|
case timeType:
|
|
return func(fv reflect.Value) error {
|
|
ptr := fv.Addr().Interface().(*time.Time)
|
|
*ptr = time.Now()
|
|
return nil
|
|
}
|
|
case nullTimeType:
|
|
return func(fv reflect.Value) error {
|
|
ptr := fv.Addr().Interface().(*sql.NullTime)
|
|
*ptr = sql.NullTime{Time: time.Now()}
|
|
return nil
|
|
}
|
|
case nullIntType:
|
|
return func(fv reflect.Value) error {
|
|
ptr := fv.Addr().Interface().(*sql.NullInt64)
|
|
*ptr = sql.NullInt64{Int64: time.Now().UnixNano()}
|
|
return nil
|
|
}
|
|
}
|
|
|
|
switch field.IndirectType.Kind() {
|
|
case reflect.Int64:
|
|
return func(fv reflect.Value) error {
|
|
ptr := fv.Addr().Interface().(*int64)
|
|
*ptr = time.Now().UnixNano()
|
|
return nil
|
|
}
|
|
case reflect.Ptr:
|
|
typ = typ.Elem()
|
|
default:
|
|
return softDeleteFieldUpdaterFallback(field)
|
|
}
|
|
|
|
switch typ { //nolint:gocritic
|
|
case timeType:
|
|
return func(fv reflect.Value) error {
|
|
now := time.Now()
|
|
fv.Set(reflect.ValueOf(&now))
|
|
return nil
|
|
}
|
|
}
|
|
|
|
switch typ.Kind() { //nolint:gocritic
|
|
case reflect.Int64:
|
|
return func(fv reflect.Value) error {
|
|
utime := time.Now().UnixNano()
|
|
fv.Set(reflect.ValueOf(&utime))
|
|
return nil
|
|
}
|
|
}
|
|
|
|
return softDeleteFieldUpdaterFallback(field)
|
|
}
|
|
|
|
func softDeleteFieldUpdaterFallback(field *Field) func(fv reflect.Value) error {
|
|
return func(fv reflect.Value) error {
|
|
return field.ScanWithCheck(fv, time.Now())
|
|
}
|
|
}
|