我试图设置一个可延迟的外键约束,以便在事务结束之前插入查找/数据透视表时不会对其进行检查。但是,它可以在 psql shell 中工作,但它不能在代码中工作。与在 psql shell 中一样,我也使用begin
in 代码启动事务。
这是sql:
create table campaign_r_company (
campaign_id uuid not null references campaign(id) on delete cascade deferrable initially deferred,
company_id varchar(32) not null,
primary key (campaign_id, company_id)
);
这是代码:
tx, err := d.Begin()
if err != nil {
return err
}
err = h(tx) // there are two db queries will be called in this function
if err == nil {
err = tx.Commit()
}
h(tx):
_, err := cxt.Exec(fmt.Sprintf(`INSERT INTO hp_campaign (%s) VALUES (%s)`, proplist("", campaignProps), arglist(1, len(campaignProps))),
id, v.Name, created, v.Updated,
)
if err != nil {
return err
}
v.Id = id
v.Created = created
if (opts & StoreOptionStoreRelated) == StoreOptionStoreRelated {
err := d.attach("company", "campaign_r_company", v.Companies, v.Id)
if err != nil {
return err
}
}
附():
func (d *Database) attach(entityName string, tableName string, ids []string, campaignID string) error {
for _, id := range ids {
stmt := fmt.Sprintf(`INSERT INTO %s (%s) VALUES ($1, $2)`, tableName, fmt.Sprintf("campaign_id, %s_id", entityName))
_, err := d.db.Exec(stmt, campaignID, id)
if err != nil {
return err
}
}
return nil
}
错误:
insert or update on table "campaign_r_company" violates foreign key constraint "campaign_r_company_campaign_id_fkey"