gotosocial/vendor/github.com/uptrace/bun/schema/table.go

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package schema
import (
"database/sql"
"fmt"
"reflect"
"strings"
"time"
"github.com/jinzhu/inflection"
"github.com/uptrace/bun/internal"
"github.com/uptrace/bun/internal/tagparser"
)
const (
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beforeAppendModelHookFlag internal.Flag = 1 << iota
beforeScanHookFlag
afterScanHookFlag
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beforeScanRowHookFlag
afterScanRowHookFlag
)
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
allFields []*Field // all fields including scanonly
Fields []*Field // PKs + DataFields
PKs []*Field
DataFields []*Field
relFields []*Field
FieldMap map[string]*Field
StructMap map[string]*structField
Relations map[string]*Relation
Unique map[string][]*Field
SoftDeleteField *Field
UpdateSoftDeleteField func(fv reflect.Value, tm time.Time) error
flags internal.Flag
}
type structField struct {
Index []int
Table *Table
}
func newTable(
dialect Dialect, typ reflect.Type, seen map[reflect.Type]*Table, canAddr bool,
) *Table {
if table, ok := seen[typ]; ok {
return table
}
table := new(Table)
seen[typ] = table
table.dialect = dialect
table.Type = typ
table.ZeroValue = reflect.New(table.Type).Elem()
table.ZeroIface = reflect.New(table.Type).Interface()
table.TypeName = internal.ToExported(table.Type.Name())
table.ModelName = internal.Underscore(table.Type.Name())
tableName := tableNameInflector(table.ModelName)
table.setName(tableName)
table.Alias = table.ModelName
table.SQLAlias = table.quoteIdent(table.ModelName)
table.Fields = make([]*Field, 0, typ.NumField())
table.FieldMap = make(map[string]*Field, typ.NumField())
table.processFields(typ, seen, canAddr)
hooks := []struct {
typ reflect.Type
flag internal.Flag
}{
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{beforeAppendModelHookType, beforeAppendModelHookFlag},
{beforeScanRowHookType, beforeScanRowHookFlag},
{afterScanRowHookType, afterScanRowHookFlag},
}
typ = reflect.PtrTo(table.Type)
for _, hook := range hooks {
if typ.Implements(hook.typ) {
table.flags = table.flags.Set(hook.flag)
}
}
return table
}
func (t *Table) init() {
for _, field := range t.relFields {
t.processRelation(field)
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}
t.relFields = nil
}
func (t *Table) processFields(
typ reflect.Type,
seen map[reflect.Type]*Table,
canAddr bool,
) {
type embeddedField struct {
prefix string
index []int
unexported bool
subtable *Table
subfield *Field
}
names := make(map[string]struct{})
embedded := make([]embeddedField, 0, 10)
for i, n := 0, typ.NumField(); i < n; i++ {
sf := typ.Field(i)
unexported := sf.PkgPath != ""
tagstr := sf.Tag.Get("bun")
if tagstr == "-" {
names[sf.Name] = struct{}{}
continue
}
tag := tagparser.Parse(tagstr)
if unexported && !sf.Anonymous { // unexported
continue
}
if sf.Anonymous {
if sf.Name == "BaseModel" && sf.Type == baseModelType {
t.processBaseModelField(sf)
continue
}
sfType := sf.Type
if sfType.Kind() == reflect.Ptr {
sfType = sfType.Elem()
}
if sfType.Kind() != reflect.Struct { // ignore unexported non-struct types
continue
}
subtable := newTable(t.dialect, sfType, seen, canAddr)
for _, subfield := range subtable.allFields {
embedded = append(embedded, embeddedField{
index: sf.Index,
unexported: unexported,
subtable: subtable,
subfield: subfield,
})
}
if tagstr != "" {
tag := tagparser.Parse(tagstr)
if tag.HasOption("inherit") || tag.HasOption("extend") {
t.Name = subtable.Name
t.TypeName = subtable.TypeName
t.SQLName = subtable.SQLName
t.SQLNameForSelects = subtable.SQLNameForSelects
t.Alias = subtable.Alias
t.SQLAlias = subtable.SQLAlias
t.ModelName = subtable.ModelName
}
}
continue
}
if prefix, ok := tag.Option("embed"); ok {
fieldType := indirectType(sf.Type)
if fieldType.Kind() != reflect.Struct {
panic(fmt.Errorf("bun: embed %s.%s: got %s, wanted reflect.Struct",
t.TypeName, sf.Name, fieldType.Kind()))
}
subtable := newTable(t.dialect, fieldType, seen, canAddr)
for _, subfield := range subtable.allFields {
embedded = append(embedded, embeddedField{
prefix: prefix,
index: sf.Index,
unexported: unexported,
subtable: subtable,
subfield: subfield,
})
}
continue
}
field := t.newField(sf, tag)
t.addField(field)
names[field.Name] = struct{}{}
if field.IndirectType.Kind() == reflect.Struct {
if t.StructMap == nil {
t.StructMap = make(map[string]*structField)
}
t.StructMap[field.Name] = &structField{
Index: field.Index,
Table: newTable(t.dialect, field.IndirectType, seen, canAddr),
}
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}
}
// Only unambiguous embedded fields must be serialized.
ambiguousNames := make(map[string]int)
ambiguousTags := make(map[string]int)
// Embedded types can never override a field that was already present at
// the top-level.
for name := range names {
ambiguousNames[name]++
ambiguousTags[name]++
}
for _, f := range embedded {
ambiguousNames[f.prefix+f.subfield.Name]++
if !f.subfield.Tag.IsZero() {
ambiguousTags[f.prefix+f.subfield.Name]++
}
}
for _, embfield := range embedded {
subfield := embfield.subfield.Clone()
if ambiguousNames[subfield.Name] > 1 &&
!(!subfield.Tag.IsZero() && ambiguousTags[subfield.Name] == 1) {
continue // ambiguous embedded field
}
subfield.Index = makeIndex(embfield.index, subfield.Index)
if embfield.prefix != "" {
subfield.Name = embfield.prefix + subfield.Name
subfield.SQLName = t.quoteIdent(subfield.Name)
}
t.addField(subfield)
}
}
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.allFields = append(t.allFields, field)
if field.Tag.HasOption("rel") || field.Tag.HasOption("m2m") {
t.relFields = append(t.relFields, field)
return
}
if field.Tag.HasOption("join") {
internal.Warn.Printf(
`%s.%s "join" option must come together with "rel" option`,
t.TypeName, field.GoName,
)
}
t.FieldMap[field.Name] = field
if altName, ok := field.Tag.Option("alt"); ok {
t.FieldMap[altName] = field
}
if field.Tag.HasOption("scanonly") {
return
}
if _, ok := field.Tag.Options["soft_delete"]; ok {
t.SoftDeleteField = field
t.UpdateSoftDeleteField = softDeleteFieldUpdater(field)
}
t.Fields = append(t.Fields, field)
if field.IsPK {
t.PKs = append(t.PKs, field)
} else {
t.DataFields = append(t.DataFields, field)
}
}
func (t *Table) LookupField(name string) *Field {
if field, ok := t.FieldMap[name]; ok {
return field
}
table := t
var index []int
for {
structName, columnName, ok := strings.Cut(name, "__")
if !ok {
field, ok := table.FieldMap[name]
if !ok {
return nil
}
return field.WithIndex(index)
}
name = columnName
strct := table.StructMap[structName]
if strct == nil {
return nil
}
table = strct.Table
index = append(index, strct.Index...)
}
}
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) 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? Try table:%s.",
t.TypeName, f.Name, tag.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.Option("table"); ok {
t.setName(s)
}
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if s, ok := tag.Option("select"); ok {
t.SQLNameForSelects = t.quoteTableName(s)
}
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if s, ok := tag.Option("alias"); ok {
t.Alias = s
t.SQLAlias = t.quoteIdent(s)
}
}
// nolint
func (t *Table) newField(sf reflect.StructField, tag tagparser.Tag) *Field {
sqlName := internal.Underscore(sf.Name)
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if tag.Name != "" && tag.Name != sqlName {
if isKnownFieldOption(tag.Name) {
internal.Warn.Printf(
"%s.%s tag name %q is also an option name, is it a mistake? Try column:%s.",
t.TypeName, sf.Name, tag.Name, tag.Name,
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)
}
sqlName = tag.Name
}
for name := range tag.Options {
if !isKnownFieldOption(name) {
internal.Warn.Printf("%s.%s has unknown tag option: %q", t.TypeName, sf.Name, name)
}
}
field := &Field{
StructField: sf,
IsPtr: sf.Type.Kind() == reflect.Ptr,
Tag: tag,
IndirectType: indirectType(sf.Type),
Index: sf.Index,
Name: sqlName,
GoName: sf.Name,
SQLName: t.quoteIdent(sqlName),
}
field.NotNull = tag.HasOption("notnull")
field.NullZero = tag.HasOption("nullzero")
if tag.HasOption("pk") {
field.IsPK = true
field.NotNull = true
}
if tag.HasOption("autoincrement") {
field.AutoIncrement = true
field.NullZero = true
}
if tag.HasOption("identity") {
field.Identity = true
}
if v, ok := tag.Options["unique"]; ok {
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var names []string
if len(v) == 1 {
// 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.
names = strings.Split(v[0], ",")
} else {
names = v
}
for _, uniqueName := range names {
if t.Unique == nil {
t.Unique = make(map[string][]*Field)
}
t.Unique[uniqueName] = append(t.Unique[uniqueName], field)
}
}
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if s, ok := tag.Option("default"); ok {
field.SQLDefault = s
}
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if s, ok := field.Tag.Option("type"); ok {
field.UserSQLType = s
}
field.DiscoveredSQLType = DiscoverSQLType(field.IndirectType)
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field.Append = FieldAppender(t.dialect, field)
field.Scan = FieldScanner(t.dialect, field)
field.IsZero = zeroChecker(field.StructField.Type)
return field
}
//---------------------------------------------------------------------------------------
func (t *Table) processRelation(field *Field) {
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if rel, ok := field.Tag.Option("rel"); ok {
t.initRelation(field, rel)
return
}
if field.Tag.HasOption("m2m") {
t.addRelation(t.m2mRelation(field))
return
}
panic("not reached")
}
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().InProgress(field.IndirectType)
if err := joinTable.CheckPKs(); err != nil {
panic(err)
}
rel := &Relation{
Type: BelongsToRelation,
Field: field,
JoinTable: joinTable,
}
if field.Tag.HasOption("join_on") {
rel.Condition = field.Tag.Options["join_on"]
}
rel.OnUpdate = "ON UPDATE NO ACTION"
if onUpdate, ok := field.Tag.Options["on_update"]; ok {
if len(onUpdate) > 1 {
panic(fmt.Errorf("bun: %s belongs-to %s: on_update option must be a single field", t.TypeName, field.GoName))
}
rule := strings.ToUpper(onUpdate[0])
if !isKnownFKRule(rule) {
internal.Warn.Printf("bun: %s belongs-to %s: unknown on_update rule %s", t.TypeName, field.GoName, rule)
}
s := fmt.Sprintf("ON UPDATE %s", rule)
rel.OnUpdate = s
}
rel.OnDelete = "ON DELETE NO ACTION"
if onDelete, ok := field.Tag.Options["on_delete"]; ok {
if len(onDelete) > 1 {
panic(fmt.Errorf("bun: %s belongs-to %s: on_delete option must be a single field", t.TypeName, field.GoName))
}
rule := strings.ToUpper(onDelete[0])
if !isKnownFKRule(rule) {
internal.Warn.Printf("bun: %s belongs-to %s: unknown on_delete rule %s", t.TypeName, field.GoName, rule)
}
s := fmt.Sprintf("ON DELETE %s", rule)
rel.OnDelete = s
}
if join, ok := field.Tag.Options["join"]; ok {
baseColumns, joinColumns := parseRelationJoin(join)
for i, baseColumn := range baseColumns {
joinColumn := joinColumns[i]
if f := t.FieldMap[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.FieldMap[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, joinTable.TypeName, joinColumn,
))
}
}
return rel
}
rel.JoinFields = joinTable.PKs
fkPrefix := internal.Underscore(field.GoName) + "_"
for _, joinPK := range joinTable.PKs {
fkName := fkPrefix + joinPK.Name
if fk := t.FieldMap[fkName]; fk != nil {
rel.BaseFields = append(rel.BaseFields, fk)
continue
}
if fk := t.FieldMap[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().InProgress(field.IndirectType)
rel := &Relation{
Type: HasOneRelation,
Field: field,
JoinTable: joinTable,
}
if field.Tag.HasOption("join_on") {
rel.Condition = field.Tag.Options["join_on"]
}
if join, ok := field.Tag.Options["join"]; ok {
baseColumns, joinColumns := parseRelationJoin(join)
for i, baseColumn := range baseColumns {
if f := t.FieldMap[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, t.TypeName, baseColumn,
))
}
joinColumn := joinColumns[i]
if f := joinTable.FieldMap[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, joinColumn,
))
}
}
return rel
}
rel.BaseFields = t.PKs
fkPrefix := internal.Underscore(t.ModelName) + "_"
for _, pk := range t.PKs {
fkName := fkPrefix + pk.Name
if f := joinTable.FieldMap[fkName]; f != nil {
rel.JoinFields = append(rel.JoinFields, f)
continue
}
if f := joinTable.FieldMap[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().InProgress(indirectType(field.IndirectType.Elem()))
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polymorphicValue, isPolymorphic := field.Tag.Option("polymorphic")
rel := &Relation{
Type: HasManyRelation,
Field: field,
JoinTable: joinTable,
}
if field.Tag.HasOption("join_on") {
rel.Condition = field.Tag.Options["join_on"]
}
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.FieldMap[baseColumn]; f != nil {
rel.BaseFields = append(rel.BaseFields, f)
} else {
panic(fmt.Errorf(
"bun: %s has-many %s: %s must have column %s",
t.TypeName, field.GoName, t.TypeName, baseColumn,
))
}
if f := joinTable.FieldMap[joinColumn]; f != nil {
rel.JoinFields = append(rel.JoinFields, f)
} else {
panic(fmt.Errorf(
"bun: %s has-many %s: %s must have column %s",
t.TypeName, field.GoName, joinTable.TypeName, joinColumn,
))
}
}
} 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.FieldMap[joinColumn]; fk != nil {
rel.JoinFields = append(rel.JoinFields, fk)
continue
}
if fk := joinTable.FieldMap[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.FieldMap[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().InProgress(indirectType(field.IndirectType.Elem()))
if err := t.CheckPKs(); err != nil {
panic(err)
}
if err := joinTable.CheckPKs(); err != nil {
panic(err)
}
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m2mTableName, ok := field.Tag.Option("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,
}
if field.Tag.HasOption("join_on") {
rel.Condition = field.Tag.Options["join_on"]
}
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
}
//------------------------------------------------------------------------------
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func (t *Table) Dialect() Dialect { return t.dialect }
func (t *Table) HasBeforeAppendModelHook() bool { return t.flags.Has(beforeAppendModelHookFlag) }
// DEPRECATED. Use HasBeforeScanRowHook.
func (t *Table) HasBeforeScanHook() bool { return t.flags.Has(beforeScanHookFlag) }
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// DEPRECATED. Use HasAfterScanRowHook.
func (t *Table) HasAfterScanHook() bool { return t.flags.Has(afterScanHookFlag) }
func (t *Table) HasBeforeScanRowHook() bool { return t.flags.Has(beforeScanRowHookFlag) }
func (t *Table) HasAfterScanRowHook() bool { return t.flags.Has(afterScanRowHookFlag) }
//------------------------------------------------------------------------------
func (t *Table) AppendNamedArg(
fmter Formatter, b []byte, name string, strct reflect.Value,
) ([]byte, bool) {
if field, ok := t.FieldMap[name]; ok {
return field.AppendValue(fmter, b, strct), 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 isKnownTableOption(name string) bool {
switch name {
case "table", "alias", "select":
return true
}
return false
}
func isKnownFieldOption(name string) bool {
switch name {
case "column",
"alt",
"type",
"array",
"hstore",
"composite",
"json_use_number",
"msgpack",
"notnull",
"nullzero",
"default",
"unique",
"soft_delete",
"scanonly",
"skipupdate",
"pk",
"autoincrement",
"rel",
"join",
"join_on",
"on_update",
"on_delete",
"m2m",
"polymorphic",
"identity":
return true
}
return false
}
func isKnownFKRule(name string) bool {
switch name {
case "CASCADE",
"RESTRICT",
"SET NULL",
"SET DEFAULT":
return true
}
return false
}
2021-11-13 11:29:08 +00:00
func parseRelationJoin(join []string) ([]string, []string) {
var ss []string
if len(join) == 1 {
ss = strings.Split(join[0], ",")
} else {
ss = 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, tm time.Time) error {
typ := field.StructField.Type
switch typ {
case timeType:
return func(fv reflect.Value, tm time.Time) error {
ptr := fv.Addr().Interface().(*time.Time)
*ptr = tm
return nil
}
case nullTimeType:
return func(fv reflect.Value, tm time.Time) error {
ptr := fv.Addr().Interface().(*sql.NullTime)
*ptr = sql.NullTime{Time: tm}
return nil
}
case nullIntType:
return func(fv reflect.Value, tm time.Time) error {
ptr := fv.Addr().Interface().(*sql.NullInt64)
*ptr = sql.NullInt64{Int64: tm.UnixNano()}
return nil
}
}
switch field.IndirectType.Kind() {
case reflect.Int64:
return func(fv reflect.Value, tm time.Time) error {
ptr := fv.Addr().Interface().(*int64)
*ptr = tm.UnixNano()
return nil
}
case reflect.Ptr:
typ = typ.Elem()
default:
return softDeleteFieldUpdaterFallback(field)
}
switch typ { //nolint:gocritic
case timeType:
return func(fv reflect.Value, tm time.Time) error {
fv.Set(reflect.ValueOf(&tm))
return nil
}
}
switch typ.Kind() { //nolint:gocritic
case reflect.Int64:
return func(fv reflect.Value, tm time.Time) error {
utime := tm.UnixNano()
fv.Set(reflect.ValueOf(&utime))
return nil
}
}
return softDeleteFieldUpdaterFallback(field)
}
func softDeleteFieldUpdaterFallback(field *Field) func(fv reflect.Value, tm time.Time) error {
return func(fv reflect.Value, tm time.Time) error {
return field.ScanWithCheck(fv, tm)
}
}
func makeIndex(a, b []int) []int {
dest := make([]int, 0, len(a)+len(b))
dest = append(dest, a...)
dest = append(dest, b...)
return dest
}