英文:
I am using postgres database with golang and i am trying to return connection object but I don't know the return type connection object
问题
在上面的示例中，返回类型应该是 *sql.DB。
英文:
func (t *DbConnection) Connect() (return type) {
dbTest, err := sql.Open("postgres", "user = praveen dbname = test_twichblade sslmode = disable")
return dbTest
}
In above example what should be the return type ?
答案1
得分: 2
Open函数返回(*DB, error)，所以你应该返回*sql.DB
func Open(driverName, dataSourceName string) (*DB, error)
func (t *DbConnection) Connect() (*sql.DB) {
dbTest, err := sql.Open("postgres", "user = praveen dbname = test_twichblade sslmode = disable")
return dbTest
}
英文:
Open function returns (*DB, error), so you should return *sql.DB
func Open(driverName, dataSourceName string) (*DB, error)
func (t *DbConnection) Connect() (*sql.DB) {
dbTest, err := sql.Open("postgres", "user = praveen dbname = test_twichblade sslmode = disable")
return dbTest
}
答案2
得分: 1
根据https://golang.org/pkg/database/sql/#Open，sql.Open返回*DB, error，所以在你的情况下应该返回*sql.DB。你可以使用这个关于database/sql包的信息https://golang.org/pkg/database/sql/。
英文:
According to https://golang.org/pkg/database/sql/#Open
sql.Open returns *DB, error, so you should return *sql.DB in your case.
You can use this information https://golang.org/pkg/database/sql/ about databse/sql package
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