func (db *mysql) GetColumns(tableName string) ([]string, map[string]*core.Column, error) {
args := []interface{}{db.DbName, tableName}
s := "SELECT `COLUMN_NAME`, `IS_NULLABLE`, `COLUMN_DEFAULT`, `COLUMN_TYPE`," +
" `COLUMN_KEY`, `EXTRA` FROM `INFORMATION_SCHEMA`.`COLUMNS` WHERE `TABLE_SCHEMA` = ? AND `TABLE_NAME` = ?"
db.LogSQL(s, args)
rows, err := db.DB().Query(s, args...)
if err != nil {
return nil, nil, err
}
defer rows.Close()
cols := make(map[string]*core.Column)
colSeq := make([]string, 0)
for rows.Next() {
col := new(core.Column)
col.Indexes = make(map[string]int)
var columnName, isNullable, colType, colKey, extra string
var colDefault *string
err = rows.Scan(&columnName, &isNullable, &colDefault, &colType, &colKey, &extra)
if err != nil {
return nil, nil, err
}
col.Name = strings.Trim(columnName, "` ")
if "YES" == isNullable {
col.Nullable = true
}
if colDefault != nil {
col.Default = *colDefault
if col.Default == "" {
col.DefaultIsEmpty = true
}
}
cts := strings.Split(colType, "(")
colName := cts[0]
colType = strings.ToUpper(colName)
var len1, len2 int
if len(cts) == 2 {
idx := strings.Index(cts[1], ")")
if colType == core.Enum && cts[1][0] == '\'' { //enum
options := strings.Split(cts[1][0:idx], ",")
col.EnumOptions = make(map[string]int)
for k, v := range options {
v = strings.TrimSpace(v)
v = strings.Trim(v, "'")
col.EnumOptions[v] = k
}
} else if colType == core.Set && cts[1][0] == '\'' {
options := strings.Split(cts[1][0:idx], ",")
col.SetOptions = make(map[string]int)
for k, v := range options {
v = strings.TrimSpace(v)
v = strings.Trim(v, "'")
col.SetOptions[v] = k
}
} else {
lens := strings.Split(cts[1][0:idx], ",")
len1, err = strconv.Atoi(strings.TrimSpace(lens[0]))
if err != nil {
return nil, nil, err
}
if len(lens) == 2 {
len2, err = strconv.Atoi(lens[1])
if err != nil {
return nil, nil, err
}
}
}
}
if colType == "FLOAT UNSIGNED" {
colType = "FLOAT"
}
col.Length = len1
col.Length2 = len2
if _, ok := core.SqlTypes[colType]; ok {
col.SQLType = core.SQLType{colType, len1, len2}
} else {
return nil, nil, errors.New(fmt.Sprintf("unkonw colType %v", colType))
}
if colKey == "PRI" {
col.IsPrimaryKey = true
}
if colKey == "UNI" {
//col.is
}
if extra == "auto_increment" {
col.IsAutoIncrement = true
}
if col.SQLType.IsText() || col.SQLType.IsTime() {
if col.Default != "" {
col.Default = "'" + col.Default + "'"
} else {
if col.DefaultIsEmpty {
col.Default = "''"
}
}
}
cols[col.Name] = col
colSeq = append(colSeq, col.Name)
}
return colSeq, cols, nil
}
func (engine *Engine) mapType(v reflect.Value) *core.Table {
t := v.Type()
table := engine.newTable()
if tb, ok := v.Interface().(TableName); ok {
table.Name = tb.TableName()
} else {
if v.CanAddr() {
if tb, ok = v.Addr().Interface().(TableName); ok {
table.Name = tb.TableName()
}
}
if table.Name == "" {
table.Name = engine.TableMapper.Obj2Table(t.Name())
}
}
table.Type = t
var idFieldColName string
var err error
var hasCacheTag, hasNoCacheTag bool
for i := 0; i < t.NumField(); i++ {
tag := t.Field(i).Tag
ormTagStr := tag.Get(engine.TagIdentifier)
var col *core.Column
fieldValue := v.Field(i)
fieldType := fieldValue.Type()
if ormTagStr != "" {
col = &core.Column{FieldName: t.Field(i).Name, Nullable: true, IsPrimaryKey: false,
IsAutoIncrement: false, MapType: core.TWOSIDES, Indexes: make(map[string]int)}
tags := splitTag(ormTagStr)
if len(tags) > 0 {
if tags[0] == "-" {
continue
}
if strings.ToUpper(tags[0]) == "EXTENDS" {
switch fieldValue.Kind() {
case reflect.Ptr:
f := fieldValue.Type().Elem()
if f.Kind() == reflect.Struct {
fieldPtr := fieldValue
fieldValue = fieldValue.Elem()
if !fieldValue.IsValid() || fieldPtr.IsNil() {
fieldValue = reflect.New(f).Elem()
}
}
fallthrough
case reflect.Struct:
parentTable := engine.mapType(fieldValue)
for _, col := range parentTable.Columns() {
col.FieldName = fmt.Sprintf("%v.%v", t.Field(i).Name, col.FieldName)
table.AddColumn(col)
for indexName, indexType := range col.Indexes {
addIndex(indexName, table, col, indexType)
}
}
continue
default:
//TODO: warning
}
}
indexNames := make(map[string]int)
var isIndex, isUnique bool
var preKey string
for j, key := range tags {
k := strings.ToUpper(key)
switch {
case k == "<-":
col.MapType = core.ONLYFROMDB
case k == "->":
col.MapType = core.ONLYTODB
case k == "PK":
col.IsPrimaryKey = true
col.Nullable = false
case k == "NULL":
if j == 0 {
col.Nullable = true
} else {
col.Nullable = (strings.ToUpper(tags[j-1]) != "NOT")
}
// TODO: for postgres how add autoincr?
/*case strings.HasPrefix(k, "AUTOINCR(") && strings.HasSuffix(k, ")"):
col.IsAutoIncrement = true
autoStart := k[len("AUTOINCR")+1 : len(k)-1]
autoStartInt, err := strconv.Atoi(autoStart)
if err != nil {
engine.LogError(err)
}
col.AutoIncrStart = autoStartInt*/
case k == "AUTOINCR":
col.IsAutoIncrement = true
//col.AutoIncrStart = 1
case k == "DEFAULT":
col.Default = tags[j+1]
case k == "CREATED":
col.IsCreated = true
case k == "VERSION":
col.IsVersion = true
col.Default = "1"
case k == "UTC":
col.TimeZone = time.UTC
case k == "LOCAL":
col.TimeZone = time.Local
case strings.HasPrefix(k, "LOCALE(") && strings.HasSuffix(k, ")"):
location := k[len("INDEX")+1 : len(k)-1]
col.TimeZone, err = time.LoadLocation(location)
if err != nil {
engine.logger.Error(err)
}
case k == "UPDATED":
col.IsUpdated = true
case k == "DELETED":
col.IsDeleted = true
case strings.HasPrefix(k, "INDEX(") && strings.HasSuffix(k, ")"):
indexName := k[len("INDEX")+1 : len(k)-1]
indexNames[indexName] = core.IndexType
case k == "INDEX":
isIndex = true
case strings.HasPrefix(k, "UNIQUE(") && strings.HasSuffix(k, ")"):
indexName := k[len("UNIQUE")+1 : len(k)-1]
indexNames[indexName] = core.UniqueType
case k == "UNIQUE":
isUnique = true
case k == "NOTNULL":
col.Nullable = false
case k == "CACHE":
if !hasCacheTag {
hasCacheTag = true
}
case k == "NOCACHE":
if !hasNoCacheTag {
hasNoCacheTag = true
}
case k == "NOT":
default:
if strings.HasPrefix(k, "'") && strings.HasSuffix(k, "'") {
if preKey != "DEFAULT" {
col.Name = key[1 : len(key)-1]
}
} else if strings.Contains(k, "(") && strings.HasSuffix(k, ")") {
fs := strings.Split(k, "(")
if _, ok := core.SqlTypes[fs[0]]; !ok {
preKey = k
continue
}
col.SQLType = core.SQLType{Name: fs[0]}
if fs[0] == core.Enum && fs[1][0] == '\'' { //enum
options := strings.Split(fs[1][0:len(fs[1])-1], ",")
col.EnumOptions = make(map[string]int)
for k, v := range options {
v = strings.TrimSpace(v)
v = strings.Trim(v, "'")
col.EnumOptions[v] = k
}
} else if fs[0] == core.Set && fs[1][0] == '\'' { //set
options := strings.Split(fs[1][0:len(fs[1])-1], ",")
col.SetOptions = make(map[string]int)
for k, v := range options {
v = strings.TrimSpace(v)
v = strings.Trim(v, "'")
col.SetOptions[v] = k
}
} else {
fs2 := strings.Split(fs[1][0:len(fs[1])-1], ",")
if len(fs2) == 2 {
col.Length, err = strconv.Atoi(fs2[0])
if err != nil {
engine.logger.Error(err)
}
col.Length2, err = strconv.Atoi(fs2[1])
if err != nil {
engine.logger.Error(err)
}
} else if len(fs2) == 1 {
col.Length, err = strconv.Atoi(fs2[0])
if err != nil {
engine.logger.Error(err)
}
}
}
} else {
if _, ok := core.SqlTypes[k]; ok {
col.SQLType = core.SQLType{Name: k}
} else if key != col.Default {
col.Name = key
}
}
engine.dialect.SqlType(col)
}
preKey = k
}
if col.SQLType.Name == "" {
col.SQLType = core.Type2SQLType(fieldType)
}
if col.Length == 0 {
col.Length = col.SQLType.DefaultLength
}
if col.Length2 == 0 {
col.Length2 = col.SQLType.DefaultLength2
}
if col.Name == "" {
col.Name = engine.ColumnMapper.Obj2Table(t.Field(i).Name)
}
if isUnique {
indexNames[col.Name] = core.UniqueType
} else if isIndex {
indexNames[col.Name] = core.IndexType
}
for indexName, indexType := range indexNames {
addIndex(indexName, table, col, indexType)
}
}
} else {
var sqlType core.SQLType
if fieldValue.CanAddr() {
if _, ok := fieldValue.Addr().Interface().(core.Conversion); ok {
sqlType = core.SQLType{Name: core.Text}
}
}
if _, ok := fieldValue.Interface().(core.Conversion); ok {
sqlType = core.SQLType{Name: core.Text}
} else {
sqlType = core.Type2SQLType(fieldType)
}
col = core.NewColumn(engine.ColumnMapper.Obj2Table(t.Field(i).Name),
t.Field(i).Name, sqlType, sqlType.DefaultLength,
sqlType.DefaultLength2, true)
}
if col.IsAutoIncrement {
col.Nullable = false
}
table.AddColumn(col)
if fieldType.Kind() == reflect.Int64 && (strings.ToUpper(col.FieldName) == "ID" || strings.HasSuffix(strings.ToUpper(col.FieldName), ".ID")) {
idFieldColName = col.Name
}
} // end for
if idFieldColName != "" && len(table.PrimaryKeys) == 0 {
col := table.GetColumn(idFieldColName)
col.IsPrimaryKey = true
col.IsAutoIncrement = true
col.Nullable = false
table.PrimaryKeys = append(table.PrimaryKeys, col.Name)
table.AutoIncrement = col.Name
}
if hasCacheTag {
if engine.Cacher != nil { // !nash! use engine's cacher if provided
engine.logger.Info("enable cache on table:", table.Name)
table.Cacher = engine.Cacher
} else {
engine.logger.Info("enable LRU cache on table:", table.Name)
table.Cacher = NewLRUCacher2(NewMemoryStore(), time.Hour, 10000) // !nashtsai! HACK use LRU cacher for now
}
}
if hasNoCacheTag {
engine.logger.Info("no cache on table:", table.Name)
table.Cacher = nil
}
return table
}