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change the method of initializing slice and fixed the length to be specified as 0

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This commit is contained in:
sivchari 2021-02-17 13:52:44 +09:00
parent 73d44a4f97
commit 16bda61a03
4 changed files with 22 additions and 18 deletions
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13
callbacks/associations.go
View File

@ -39,10 +39,10 @@ func SaveBeforeAssociations(create bool) func(db *gorm.DB) {
switch db.Statement.ReflectValue.Kind() { switch db.Statement.ReflectValue.Kind() {
case reflect.Slice, reflect.Array: case reflect.Slice, reflect.Array:
var ( var (
objs []reflect.Value
fieldType = rel.Field.FieldType fieldType = rel.Field.FieldType
isPtr = fieldType.Kind() == reflect.Ptr isPtr = fieldType.Kind() == reflect.Ptr
) )
objs := make([]reflect.Value, 0, db.Statement.ReflectValue.Len())
if !isPtr { if !isPtr {
fieldType = reflect.PtrTo(fieldType) fieldType = reflect.PtrTo(fieldType)
@ -140,7 +140,7 @@ func SaveAfterAssociations(create bool) func(db *gorm.DB) {
} }
if elems.Len() > 0 { if elems.Len() > 0 {
assignmentColumns := []string{} assignmentColumns := make([]string, 0, len(rel.References))
for _, ref := range rel.References { for _, ref := range rel.References {
assignmentColumns = append(assignmentColumns, ref.ForeignKey.DBName) assignmentColumns = append(assignmentColumns, ref.ForeignKey.DBName)
} }
@ -154,7 +154,7 @@ func SaveAfterAssociations(create bool) func(db *gorm.DB) {
f = f.Addr() f = f.Addr()
} }
assignmentColumns := []string{} assignmentColumns := make([]string, 0, len(rel.References))
for _, ref := range rel.References { for _, ref := range rel.References {
if ref.OwnPrimaryKey { if ref.OwnPrimaryKey {
fv, _ := ref.PrimaryKey.ValueOf(db.Statement.ReflectValue) fv, _ := ref.PrimaryKey.ValueOf(db.Statement.ReflectValue)
@ -219,7 +219,7 @@ func SaveAfterAssociations(create bool) func(db *gorm.DB) {
} }
if elems.Len() > 0 { if elems.Len() > 0 {
assignmentColumns := []string{} assignmentColumns := make([]string, 0, len(rel.References))
for _, ref := range rel.References { for _, ref := range rel.References {
assignmentColumns = append(assignmentColumns, ref.ForeignKey.DBName) assignmentColumns = append(assignmentColumns, ref.ForeignKey.DBName)
} }
@ -324,7 +324,7 @@ func onConflictOption(stmt *gorm.Statement, s *schema.Schema, selectColumns map[
} }
if len(defaultUpdatingColumns) > 0 { if len(defaultUpdatingColumns) > 0 {
var columns []clause.Column columns := make([]clause.Column, 0, len(s.PrimaryFieldDBNames))
for _, dbName := range s.PrimaryFieldDBNames { for _, dbName := range s.PrimaryFieldDBNames {
columns = append(columns, clause.Column{Name: dbName}) columns = append(columns, clause.Column{Name: dbName})
} }
@ -340,10 +340,11 @@ func onConflictOption(stmt *gorm.Statement, s *schema.Schema, selectColumns map[
func saveAssociations(db *gorm.DB, rel *schema.Relationship, values interface{}, selectColumns map[string]bool, restricted bool, defaultUpdatingColumns []string) error { func saveAssociations(db *gorm.DB, rel *schema.Relationship, values interface{}, selectColumns map[string]bool, restricted bool, defaultUpdatingColumns []string) error {
var ( var (
selects, omits []string
onConflict = onConflictOption(db.Statement, rel.FieldSchema, selectColumns, restricted, defaultUpdatingColumns) onConflict = onConflictOption(db.Statement, rel.FieldSchema, selectColumns, restricted, defaultUpdatingColumns)
refName = rel.Name + "." refName = rel.Name + "."
) )
selects := make([]string, 0, len(selectColumns))
omits := make([]string, 0, len(selectColumns))
for name, ok := range selectColumns { for name, ok := range selectColumns {
columnName := "" columnName := ""

9
callbacks/delete.go
View File

@ -41,7 +41,7 @@ func DeleteBeforeAssociations(db *gorm.DB) {
} }
if len(db.Statement.Selects) > 0 { if len(db.Statement.Selects) > 0 {
var selects []string selects := make([]string, 0, len(db.Statement.Selects))
for _, s := range db.Statement.Selects { for _, s := range db.Statement.Selects {
if s == clause.Associations { if s == clause.Associations {
selects = append(selects, s) selects = append(selects, s)
@ -69,14 +69,15 @@ func DeleteBeforeAssociations(db *gorm.DB) {
} }
case schema.Many2Many: case schema.Many2Many:
var ( var (
queryConds []clause.Expression
foreignFields []*schema.Field
relForeignKeys []string
modelValue = reflect.New(rel.JoinTable.ModelType).Interface() modelValue = reflect.New(rel.JoinTable.ModelType).Interface()
table = rel.JoinTable.Table table = rel.JoinTable.Table
tx = db.Session(&gorm.Session{NewDB: true}).Model(modelValue).Table(table) tx = db.Session(&gorm.Session{NewDB: true}).Model(modelValue).Table(table)
) )
queryConds := make([]clause.Expression, 0, len(rel.References))
foreignFields := make([]*schema.Field, 0, len(rel.References))
relForeignKeys := make([]string, 0, len(rel.References))
for _, ref := range rel.References { for _, ref := range rel.References {
if ref.OwnPrimaryKey { if ref.OwnPrimaryKey {
foreignFields = append(foreignFields, ref.PrimaryKey) foreignFields = append(foreignFields, ref.PrimaryKey)

6
callbacks/preload.go
View File

@ -27,8 +27,10 @@ func preload(db *gorm.DB, rel *schema.Relationship, conds []interface{}, preload
}) })
if rel.JoinTable != nil { if rel.JoinTable != nil {
var joinForeignFields, joinRelForeignFields []*schema.Field joinForeignFields := make([]*schema.Field, 0, len(rel.References))
var joinForeignKeys []string joinRelForeignFields := make([]*schema.Field, 0, len(rel.References))
joinForeignKeys := make([]string, 0, len(rel.References))
for _, ref := range rel.References { for _, ref := range rel.References {
if ref.OwnPrimaryKey { if ref.OwnPrimaryKey {
joinForeignKeys = append(joinForeignKeys, ref.ForeignKey.DBName) joinForeignKeys = append(joinForeignKeys, ref.ForeignKey.DBName)

2
schema/naming.go
View File

@ -92,7 +92,7 @@ var (
) )
func init() { func init() {
var commonInitialismsForReplacer []string commonInitialismsForReplacer := make([]string, 0, len(commonInitialisms))
for _, initialism := range commonInitialisms { for _, initialism := range commonInitialisms {
commonInitialismsForReplacer = append(commonInitialismsForReplacer, initialism, strings.Title(strings.ToLower(initialism))) commonInitialismsForReplacer = append(commonInitialismsForReplacer, initialism, strings.Title(strings.ToLower(initialism)))
} }