gorm/main.go

323 lines
7.7 KiB
Go

package gorm
import (
"database/sql"
"github.com/jinzhu/gorm/dialect"
)
type DB struct {
Value interface{}
Error error
callback *callback
db sqlCommon
parent *DB
search *search
logMode int
logger logger
dialect dialect.Dialect
tagIdentifier string
singularTable bool
}
func Open(driver, source string) (DB, error) {
var err error
db := DB{dialect: dialect.New(driver), tagIdentifier: "sql", logger: defaultLogger, callback: DefaultCallback}
db.db, err = sql.Open(driver, source)
db.parent = &db
return db, err
}
func (s *DB) DB() *sql.DB {
return s.db.(*sql.DB)
}
// Return the underlying sql.DB or sql.Tx instance.
// Use of this method is discouraged. It's mainly intended to allow
// coexistence with legacy non-GORM code.
func (s *DB) CommonDB() sqlCommon {
return s.db
}
func (s *DB) Callback() *callback {
s.parent.callback = s.parent.callback.clone()
return s.parent.callback
}
func (s *DB) SetTagIdentifier(str string) {
s.parent.tagIdentifier = str
}
func (s *DB) SetLogger(l logger) {
s.parent.logger = l
}
func (s *DB) LogMode(b bool) *DB {
if b {
s.logMode = 2
} else {
s.logMode = 1
}
return s
}
func (s *DB) SingularTable(b bool) {
s.parent.singularTable = b
}
func (s *DB) Where(query interface{}, args ...interface{}) *DB {
return s.clone().search.where(query, args...).db
}
func (s *DB) Or(query interface{}, args ...interface{}) *DB {
return s.clone().search.or(query, args...).db
}
func (s *DB) Not(query interface{}, args ...interface{}) *DB {
return s.clone().search.not(query, args...).db
}
func (s *DB) Limit(value interface{}) *DB {
return s.clone().search.limit(value).db
}
func (s *DB) Offset(value interface{}) *DB {
return s.clone().search.offset(value).db
}
func (s *DB) Order(value string, reorder ...bool) *DB {
return s.clone().search.order(value, reorder...).db
}
func (s *DB) Select(value interface{}) *DB {
return s.clone().search.selects(value).db
}
func (s *DB) Group(query string) *DB {
return s.clone().search.group(query).db
}
func (s *DB) Having(query string, values ...interface{}) *DB {
return s.clone().search.having(query, values...).db
}
func (s *DB) Joins(query string) *DB {
return s.clone().search.joins(query).db
}
func (s *DB) Includes(value interface{}) *DB {
return s.clone().search.includes(value).db
}
func (s *DB) Scopes(funcs ...func(*DB) *DB) *DB {
c := s
for _, f := range funcs {
c = f(c)
}
return c
}
func (s *DB) Unscoped() *DB {
return s.clone().search.unscoped().db
}
func (s *DB) Attrs(attrs ...interface{}) *DB {
return s.clone().search.attrs(attrs...).db
}
func (s *DB) Assign(attrs ...interface{}) *DB {
return s.clone().search.assign(attrs...).db
}
func (s *DB) First(out interface{}, where ...interface{}) *DB {
scope := s.clone().NewScope(out)
scope.Search = scope.Search.clone().order(scope.PrimaryKey()).limit(1)
return scope.inlineCondition(where...).callCallbacks(s.parent.callback.queries).db
}
func (s *DB) Last(out interface{}, where ...interface{}) *DB {
scope := s.clone().NewScope(out)
scope.Search = scope.Search.clone().order(scope.PrimaryKey() + " DESC").limit(1)
return scope.inlineCondition(where...).callCallbacks(s.parent.callback.queries).db
}
func (s *DB) Find(out interface{}, where ...interface{}) *DB {
return s.clone().NewScope(out).inlineCondition(where...).callCallbacks(s.parent.callback.queries).db
}
func (s *DB) Row() *sql.Row {
return s.NewScope(s.Value).row()
}
func (s *DB) Rows() (*sql.Rows, error) {
return s.NewScope(s.Value).rows()
}
func (s *DB) Scan(dest interface{}) *DB {
scope := s.clone().NewScope(s.Value).Set("gorm:query_destination", dest)
Query(scope)
return scope.db
}
func (s *DB) FirstOrInit(out interface{}, where ...interface{}) *DB {
c := s.clone()
if c.First(out, where...).Error == RecordNotFound {
c.NewScope(out).inlineCondition(where...).initialize()
} else {
c.NewScope(out).updatedAttrsWithValues(convertInterfaceToMap(s.search.AssignAttrs), false)
}
return c
}
func (s *DB) FirstOrCreate(out interface{}, where ...interface{}) *DB {
c := s.clone()
if c.First(out, where...).Error == RecordNotFound {
c.NewScope(out).inlineCondition(where...).initialize().callCallbacks(s.parent.callback.creates)
} else if len(s.search.AssignAttrs) > 0 {
c.NewScope(out).Set("gorm:update_interface", s.search.AssignAttrs).callCallbacks(s.parent.callback.updates)
}
return c
}
func (s *DB) Update(attrs ...interface{}) *DB {
return s.Updates(toSearchableMap(attrs...), true)
}
func (s *DB) Updates(values interface{}, ignoreProtectedAttrs ...bool) *DB {
return s.clone().NewScope(s.Value).
Set("gorm:update_interface", values).
Set("gorm:ignore_protected_attrs", len(ignoreProtectedAttrs) > 0).
callCallbacks(s.parent.callback.updates).db
}
func (s *DB) UpdateColumn(attrs ...interface{}) *DB {
return s.UpdateColumns(toSearchableMap(attrs...))
}
func (s *DB) UpdateColumns(values interface{}) *DB {
return s.clone().NewScope(s.Value).
Set("gorm:update_interface", values).
Set("gorm:update_column", true).
callCallbacks(s.parent.callback.updates).db
}
func (s *DB) Save(value interface{}) *DB {
scope := s.clone().NewScope(value)
if scope.PrimaryKeyZero() {
return scope.callCallbacks(s.parent.callback.creates).db
} else {
return scope.callCallbacks(s.parent.callback.updates).db
}
}
func (s *DB) Delete(value interface{}) *DB {
return s.clone().NewScope(value).callCallbacks(s.parent.callback.deletes).db
}
func (s *DB) Raw(sql string, values ...interface{}) *DB {
return s.clone().search.raw(true).where(sql, values...).db
}
func (s *DB) Exec(sql string, values ...interface{}) *DB {
scope := s.clone().NewScope(nil)
scope.Raw(scope.buildWhereCondition(map[string]interface{}{"query": sql, "args": values}))
return scope.Exec().db
}
func (s *DB) Model(value interface{}) *DB {
c := s.clone()
c.Value = value
return c
}
func (s *DB) Related(value interface{}, foreignKeys ...string) *DB {
return s.clone().NewScope(s.Value).related(value, foreignKeys...).db
}
func (s *DB) Pluck(column string, value interface{}) *DB {
return s.NewScope(s.Value).pluck(column, value).db
}
func (s *DB) Count(value interface{}) *DB {
return s.NewScope(s.Value).count(value).db
}
func (s *DB) Table(name string) *DB {
return s.clone().search.table(name).db
}
func (s *DB) Debug() *DB {
return s.clone().LogMode(true)
}
func (s *DB) Begin() *DB {
c := s.clone()
if db, ok := c.db.(sqlDb); ok {
tx, err := db.Begin()
c.db = interface{}(tx).(sqlCommon)
c.err(err)
} else {
c.err(CantStartTransaction)
}
return c
}
func (s *DB) Commit() *DB {
if db, ok := s.db.(sqlTx); ok {
s.err(db.Commit())
} else {
s.err(NoValidTransaction)
}
return s
}
func (s *DB) Rollback() *DB {
if db, ok := s.db.(sqlTx); ok {
s.err(db.Rollback())
} else {
s.err(NoValidTransaction)
}
return s
}
func (s *DB) NewRecord(value interface{}) bool {
return s.clone().NewScope(value).PrimaryKeyZero()
}
func (s *DB) RecordNotFound() bool {
return s.Error == RecordNotFound
}
// Migrations
func (s *DB) CreateTable(value interface{}) *DB {
return s.clone().NewScope(value).createTable().db
}
func (s *DB) DropTable(value interface{}) *DB {
return s.clone().NewScope(value).dropTable().db
}
func (s *DB) AutoMigrate(value interface{}) *DB {
return s.clone().NewScope(value).autoMigrate().db
}
func (s *DB) ModifyColumn(column string, typ string) *DB {
s.clone().NewScope(s.Value).modifyColumn(column, typ)
return s
}
func (s *DB) DropColumn(column string) *DB {
s.clone().NewScope(s.Value).dropColumn(column)
return s
}
func (s *DB) AddIndex(column string, indexName ...string) *DB {
s.clone().NewScope(s.Value).addIndex(column, indexName...)
return s
}
func (s *DB) RemoveIndex(column string) *DB {
s.clone().NewScope(s.Value).removeIndex(column)
return s
}