orm support auto create db

orm/db_mysql.go

@@ -17,6 +17,26 @@ var mysqlOperators = map[string]string{
 	"iendswith":   "LIKE ?",
 }
 
+var mysqlTypes = map[string]string{
+	"auto":            "AUTO_INCREMENT NOT NULL PRIMARY KEY",
+	"pk":              "NOT NULL PRIMARY KEY",
+	"bool":            "bool",
+	"string":          "varchar(%d)",
+	"string-text":     "longtext",
+	"time.Time-date":  "date",
+	"time.Time":       "datetime",
+	"int8":            "tinyint",
+	"int16":           "smallint",
+	"int32":           "integer",
+	"int64":           "bigint",
+	"uint8":           "tinyint unsigned",
+	"uint16":          "smallint unsigned",
+	"uint32":          "integer unsigned",
+	"uint64":          "bigint unsigned",
+	"float64":         "double precision",
+	"float64-decimal": "numeric(%d, %d)",
+}
+
 type dbBaseMysql struct {
 	dbBase
 }
@@ -27,6 +47,10 @@ func (d *dbBaseMysql) OperatorSql(operator string) string {
 	return mysqlOperators[operator]
 }
 
+func (d *dbBaseMysql) DbTypes() map[string]string {
+	return mysqlTypes
+}
+
 func newdbBaseMysql() dbBaser {
 	b := new(dbBaseMysql)
 	b.ins = b