fix: compatible with pg (#1683)

* fix: fix pg migrate

* fix: compatible with pg

* fix: compatible with pg

docker/experience_pg_vm/initsql_for_postgres/a-n9e-for-Postgres.sql

@@ -374,7 +374,7 @@ CREATE TABLE alert_subscribe (
     cluster varchar(128) not null,
     rule_id bigint not null default 0,
     severities varchar(32) not null default '',
-    tags varchar(4096) not null default '' ,
+    tags varchar(4096) not null default '[]',
     redefine_severity smallint default 0 ,
     new_severity smallint not null ,
     redefine_channels smallint default 0 ,

etc/config.toml

@@ -82,6 +82,7 @@ RSAPassWord = ""
 
 [DB]
 # postgres: host=%s port=%s user=%s dbname=%s password=%s sslmode=%s
+# postgres: DSN="host=127.0.0.1 port=5432 user=root dbname=n9e_v6 password=1234 sslmode=disable"
 DSN="root:1234@tcp(127.0.0.1:3306)/n9e_v6?charset=utf8mb4&parseTime=True&loc=Local&allowNativePasswords=true"
 # enable debug mode or not
 Debug = false

pkg/ormx/types.go

@@ -59,7 +59,13 @@ func (j *JSONObj) UnmarshalJSON(data []byte) error {
 func (j *JSONArr) Scan(value interface{}) error {
 	bytes, ok := value.([]byte)
 	if !ok {
-		return errors.New(fmt.Sprint("Failed to unmarshal JSONB value:", value))
+		// 判断是不是string类型  Postgres的varchar scan出来是string类型
+		strings, ok := value.(string)
+		if !ok {
+			return errors.New(fmt.Sprint("Failed to unmarshal JSONB value:", value))
+		}
+		// string类型转byte[]
+		bytes = []byte(strings)
 	}
 
 	result := json.RawMessage{}