mirror of
https://github.com/astaxie/beego.git
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add comments for orm packages, part 1
This commit is contained in:
傅小黑
parent
32799bc259
commit
f5a5ebe16b
12
orm/cmd.go
12
orm/cmd.go
@ -16,6 +16,7 @@ var (
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commands = make(map[string]commander)
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)
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// print help.
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func printHelp(errs ...string) {
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content := `orm command usage:
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@ -31,6 +32,7 @@ func printHelp(errs ...string) {
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os.Exit(2)
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}
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// listen for orm command and then run it if command arguments passed.
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func RunCommand() {
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if len(os.Args) < 2 || os.Args[1] != "orm" {
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return
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@ -58,6 +60,7 @@ func RunCommand() {
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}
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}
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// sync database struct command interface.
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type commandSyncDb struct {
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al *alias
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force bool
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@ -66,6 +69,7 @@ type commandSyncDb struct {
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rtOnError bool
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}
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// parse orm command line arguments.
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func (d *commandSyncDb) Parse(args []string) {
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var name string
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@ -78,6 +82,7 @@ func (d *commandSyncDb) Parse(args []string) {
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d.al = getDbAlias(name)
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}
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// run orm line command.
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func (d *commandSyncDb) Run() error {
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var drops []string
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if d.force {
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@ -208,10 +213,12 @@ func (d *commandSyncDb) Run() error {
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return nil
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}
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// database creation commander interface implement.
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type commandSqlAll struct {
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al *alias
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}
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// parse orm command line arguments.
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func (d *commandSqlAll) Parse(args []string) {
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var name string
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@ -222,6 +229,7 @@ func (d *commandSqlAll) Parse(args []string) {
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d.al = getDbAlias(name)
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}
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// run orm line command.
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func (d *commandSqlAll) Run() error {
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sqls, indexes := getDbCreateSql(d.al)
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var all []string
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@ -243,6 +251,10 @@ func init() {
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commands["sqlall"] = new(commandSqlAll)
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}
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// run syncdb command line.
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// name means table's alias name. default is "default".
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// force means run next sql if the current is error.
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// verbose means show all info when running command or not.
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func RunSyncdb(name string, force bool, verbose bool) error {
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BootStrap()
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@ -12,6 +12,7 @@ type dbIndex struct {
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Sql string
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}
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// create database drop sql.
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func getDbDropSql(al *alias) (sqls []string) {
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if len(modelCache.cache) == 0 {
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fmt.Println("no Model found, need register your model")
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@ -26,6 +27,7 @@ func getDbDropSql(al *alias) (sqls []string) {
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return sqls
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}
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// get database column type string.
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func getColumnTyp(al *alias, fi *fieldInfo) (col string) {
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T := al.DbBaser.DbTypes()
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fieldType := fi.fieldType
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@ -79,6 +81,7 @@ checkColumn:
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return
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}
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// create alter sql string.
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func getColumnAddQuery(al *alias, fi *fieldInfo) string {
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Q := al.DbBaser.TableQuote()
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typ := getColumnTyp(al, fi)
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@ -90,6 +93,7 @@ func getColumnAddQuery(al *alias, fi *fieldInfo) string {
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return fmt.Sprintf("ALTER TABLE %s%s%s ADD COLUMN %s%s%s %s", Q, fi.mi.table, Q, Q, fi.column, Q, typ)
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}
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// create database creation string.
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func getDbCreateSql(al *alias) (sqls []string, tableIndexes map[string][]dbIndex) {
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if len(modelCache.cache) == 0 {
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fmt.Println("no Model found, need register your model")
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41
orm/db.go
41
orm/db.go
@ -15,7 +15,7 @@ const (
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)
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var (
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ErrMissPK = errors.New("missed pk value")
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ErrMissPK = errors.New("missed pk value") // missing pk error
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)
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var (
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@ -45,12 +45,15 @@ var (
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}
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)
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// an instance of dbBaser interface/
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type dbBase struct {
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ins dbBaser
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}
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// check dbBase implements dbBaser interface.
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var _ dbBaser = new(dbBase)
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// get struct columns values as interface slice.
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func (d *dbBase) collectValues(mi *modelInfo, ind reflect.Value, cols []string, skipAuto bool, insert bool, names *[]string, tz *time.Location) (values []interface{}, err error) {
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var columns []string
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@ -87,6 +90,7 @@ func (d *dbBase) collectValues(mi *modelInfo, ind reflect.Value, cols []string,
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return
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}
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// get one field value in struct column as interface.
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func (d *dbBase) collectFieldValue(mi *modelInfo, fi *fieldInfo, ind reflect.Value, insert bool, tz *time.Location) (interface{}, error) {
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var value interface{}
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if fi.pk {
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@ -155,6 +159,7 @@ func (d *dbBase) collectFieldValue(mi *modelInfo, fi *fieldInfo, ind reflect.Val
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return value, nil
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}
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// create insert sql preparation statement object.
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func (d *dbBase) PrepareInsert(q dbQuerier, mi *modelInfo) (stmtQuerier, string, error) {
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Q := d.ins.TableQuote()
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@ -180,6 +185,7 @@ func (d *dbBase) PrepareInsert(q dbQuerier, mi *modelInfo) (stmtQuerier, string,
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return stmt, query, err
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}
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// insert struct with prepared statement and given struct reflect value.
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func (d *dbBase) InsertStmt(stmt stmtQuerier, mi *modelInfo, ind reflect.Value, tz *time.Location) (int64, error) {
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values, err := d.collectValues(mi, ind, mi.fields.dbcols, true, true, nil, tz)
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if err != nil {
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@ -200,6 +206,7 @@ func (d *dbBase) InsertStmt(stmt stmtQuerier, mi *modelInfo, ind reflect.Value,
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}
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}
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// query sql ,read records and persist in dbBaser.
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func (d *dbBase) Read(q dbQuerier, mi *modelInfo, ind reflect.Value, tz *time.Location, cols []string) error {
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var whereCols []string
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var args []interface{}
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@ -259,6 +266,7 @@ func (d *dbBase) Read(q dbQuerier, mi *modelInfo, ind reflect.Value, tz *time.Lo
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return nil
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}
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// execute insert sql dbQuerier with given struct reflect.Value.
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func (d *dbBase) Insert(q dbQuerier, mi *modelInfo, ind reflect.Value, tz *time.Location) (int64, error) {
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names := make([]string, 0, len(mi.fields.dbcols)-1)
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values, err := d.collectValues(mi, ind, mi.fields.dbcols, true, true, &names, tz)
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@ -269,6 +277,7 @@ func (d *dbBase) Insert(q dbQuerier, mi *modelInfo, ind reflect.Value, tz *time.
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return d.InsertValue(q, mi, false, names, values)
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}
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// multi-insert sql with given slice struct reflect.Value.
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func (d *dbBase) InsertMulti(q dbQuerier, mi *modelInfo, sind reflect.Value, bulk int, tz *time.Location) (int64, error) {
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var (
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cnt int64
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@ -325,6 +334,8 @@ func (d *dbBase) InsertMulti(q dbQuerier, mi *modelInfo, sind reflect.Value, bul
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return cnt, nil
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}
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// execute insert sql with given struct and given values.
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// insert the given values, not the field values in struct.
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func (d *dbBase) InsertValue(q dbQuerier, mi *modelInfo, isMulti bool, names []string, values []interface{}) (int64, error) {
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Q := d.ins.TableQuote()
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@ -364,6 +375,7 @@ func (d *dbBase) InsertValue(q dbQuerier, mi *modelInfo, isMulti bool, names []s
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}
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}
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// execute update sql dbQuerier with given struct reflect.Value.
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func (d *dbBase) Update(q dbQuerier, mi *modelInfo, ind reflect.Value, tz *time.Location, cols []string) (int64, error) {
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pkName, pkValue, ok := getExistPk(mi, ind)
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if ok == false {
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@ -404,6 +416,8 @@ func (d *dbBase) Update(q dbQuerier, mi *modelInfo, ind reflect.Value, tz *time.
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return 0, nil
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}
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// execute delete sql dbQuerier with given struct reflect.Value.
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// delete index is pk.
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func (d *dbBase) Delete(q dbQuerier, mi *modelInfo, ind reflect.Value, tz *time.Location) (int64, error) {
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pkName, pkValue, ok := getExistPk(mi, ind)
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if ok == false {
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@ -445,6 +459,8 @@ func (d *dbBase) Delete(q dbQuerier, mi *modelInfo, ind reflect.Value, tz *time.
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return 0, nil
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}
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// update table-related record by querySet.
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// need querySet not struct reflect.Value to update related records.
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func (d *dbBase) UpdateBatch(q dbQuerier, qs *querySet, mi *modelInfo, cond *Condition, params Params, tz *time.Location) (int64, error) {
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columns := make([]string, 0, len(params))
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values := make([]interface{}, 0, len(params))
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@ -520,6 +536,8 @@ func (d *dbBase) UpdateBatch(q dbQuerier, qs *querySet, mi *modelInfo, cond *Con
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return 0, nil
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}
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// delete related records.
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// do UpdateBanch or DeleteBanch by condition of tables' relationship.
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func (d *dbBase) deleteRels(q dbQuerier, mi *modelInfo, args []interface{}, tz *time.Location) error {
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for _, fi := range mi.fields.fieldsReverse {
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fi = fi.reverseFieldInfo
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@ -546,6 +564,7 @@ func (d *dbBase) deleteRels(q dbQuerier, mi *modelInfo, args []interface{}, tz *
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return nil
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}
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// delete table-related records.
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func (d *dbBase) DeleteBatch(q dbQuerier, qs *querySet, mi *modelInfo, cond *Condition, tz *time.Location) (int64, error) {
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tables := newDbTables(mi, d.ins)
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tables.skipEnd = true
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@ -623,6 +642,7 @@ func (d *dbBase) DeleteBatch(q dbQuerier, qs *querySet, mi *modelInfo, cond *Con
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return 0, nil
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}
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// read related records.
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func (d *dbBase) ReadBatch(q dbQuerier, qs *querySet, mi *modelInfo, cond *Condition, container interface{}, tz *time.Location, cols []string) (int64, error) {
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val := reflect.ValueOf(container)
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@ -832,6 +852,7 @@ func (d *dbBase) ReadBatch(q dbQuerier, qs *querySet, mi *modelInfo, cond *Condi
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return cnt, nil
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}
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// excute count sql and return count result int64.
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func (d *dbBase) Count(q dbQuerier, qs *querySet, mi *modelInfo, cond *Condition, tz *time.Location) (cnt int64, err error) {
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tables := newDbTables(mi, d.ins)
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tables.parseRelated(qs.related, qs.relDepth)
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@ -852,6 +873,7 @@ func (d *dbBase) Count(q dbQuerier, qs *querySet, mi *modelInfo, cond *Condition
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return
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}
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// generate sql with replacing operator string placeholders and replaced values.
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func (d *dbBase) GenerateOperatorSql(mi *modelInfo, fi *fieldInfo, operator string, args []interface{}, tz *time.Location) (string, []interface{}) {
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sql := ""
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params := getFlatParams(fi, args, tz)
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@ -909,6 +931,7 @@ func (d *dbBase) GenerateOperatorLeftCol(*fieldInfo, string, *string) {
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// default not use
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}
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// set values to struct column.
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func (d *dbBase) setColsValues(mi *modelInfo, ind *reflect.Value, cols []string, values []interface{}, tz *time.Location) {
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for i, column := range cols {
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val := reflect.Indirect(reflect.ValueOf(values[i])).Interface()
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@ -930,6 +953,7 @@ func (d *dbBase) setColsValues(mi *modelInfo, ind *reflect.Value, cols []string,
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}
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}
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// convert value from database result to value following in field type.
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func (d *dbBase) convertValueFromDB(fi *fieldInfo, val interface{}, tz *time.Location) (interface{}, error) {
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if val == nil {
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return nil, nil
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@ -1082,6 +1106,7 @@ end:
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}
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// set one value to struct column field.
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func (d *dbBase) setFieldValue(fi *fieldInfo, value interface{}, field reflect.Value) (interface{}, error) {
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fieldType := fi.fieldType
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@ -1156,6 +1181,7 @@ setValue:
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return value, nil
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}
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// query sql, read values , save to *[]ParamList.
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func (d *dbBase) ReadValues(q dbQuerier, qs *querySet, mi *modelInfo, cond *Condition, exprs []string, container interface{}, tz *time.Location) (int64, error) {
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var (
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@ -1323,6 +1349,7 @@ func (d *dbBase) ReadValues(q dbQuerier, qs *querySet, mi *modelInfo, cond *Cond
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return cnt, nil
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}
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// flag of update joined record.
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func (d *dbBase) SupportUpdateJoin() bool {
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return true
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}
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@ -1331,30 +1358,37 @@ func (d *dbBase) MaxLimit() uint64 {
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return 18446744073709551615
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}
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// return quote.
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func (d *dbBase) TableQuote() string {
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return "`"
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}
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// replace value placeholer in parametered sql string.
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func (d *dbBase) ReplaceMarks(query *string) {
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// default use `?` as mark, do nothing
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}
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// flag of RETURNING sql.
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func (d *dbBase) HasReturningID(*modelInfo, *string) bool {
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return false
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}
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// convert time from db.
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func (d *dbBase) TimeFromDB(t *time.Time, tz *time.Location) {
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*t = t.In(tz)
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}
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// convert time to db.
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func (d *dbBase) TimeToDB(t *time.Time, tz *time.Location) {
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*t = t.In(tz)
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}
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// get database types.
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func (d *dbBase) DbTypes() map[string]string {
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return nil
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}
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// gt all tables.
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func (d *dbBase) GetTables(db dbQuerier) (map[string]bool, error) {
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tables := make(map[string]bool)
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query := d.ins.ShowTablesQuery()
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@ -1379,6 +1413,7 @@ func (d *dbBase) GetTables(db dbQuerier) (map[string]bool, error) {
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return tables, nil
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}
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// get all cloumns in table.
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func (d *dbBase) GetColumns(db dbQuerier, table string) (map[string][3]string, error) {
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columns := make(map[string][3]string)
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query := d.ins.ShowColumnsQuery(table)
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@ -1405,18 +1440,22 @@ func (d *dbBase) GetColumns(db dbQuerier, table string) (map[string][3]string, e
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return columns, nil
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}
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// not implement.
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func (d *dbBase) OperatorSql(operator string) string {
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panic(ErrNotImplement)
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}
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// not implement.
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func (d *dbBase) ShowTablesQuery() string {
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panic(ErrNotImplement)
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}
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// not implement.
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func (d *dbBase) ShowColumnsQuery(table string) string {
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panic(ErrNotImplement)
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}
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// not implement.
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func (d *dbBase) IndexExists(dbQuerier, string, string) bool {
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panic(ErrNotImplement)
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}
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@ -9,27 +9,32 @@ import (
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"time"
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)
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// database driver constant int.
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type DriverType int
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const (
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_ DriverType = iota
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DR_MySQL
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DR_Sqlite
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DR_Oracle
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DR_Postgres
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_ DriverType = iota // int enum type
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DR_MySQL // mysql
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DR_Sqlite // sqlite
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DR_Oracle // oracle
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DR_Postgres // pgsql
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)
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// database driver string.
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type driver string
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// get type constant int of current driver..
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func (d driver) Type() DriverType {
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a, _ := dataBaseCache.get(string(d))
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return a.Driver
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}
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// get name of current driver
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func (d driver) Name() string {
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return string(d)
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}
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// check driver iis implemented Driver interface or not.
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var _ Driver = new(driver)
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var (
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@ -47,11 +52,13 @@ var (
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}
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)
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// database alias cacher.
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type _dbCache struct {
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mux sync.RWMutex
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cache map[string]*alias
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}
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// add database alias with original name.
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func (ac *_dbCache) add(name string, al *alias) (added bool) {
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ac.mux.Lock()
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defer ac.mux.Unlock()
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@ -62,6 +69,7 @@ func (ac *_dbCache) add(name string, al *alias) (added bool) {
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return
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}
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// get database alias if cached.
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func (ac *_dbCache) get(name string) (al *alias, ok bool) {
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ac.mux.RLock()
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defer ac.mux.RUnlock()
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@ -69,6 +77,7 @@ func (ac *_dbCache) get(name string) (al *alias, ok bool) {
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return
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}
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// get default alias.
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func (ac *_dbCache) getDefault() (al *alias) {
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al, _ = ac.get("default")
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return
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