336 lines
13 KiB
Go
336 lines
13 KiB
Go
// +build go1.8
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package sqlx
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import (
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"context"
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"database/sql"
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"fmt"
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"io/ioutil"
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"path/filepath"
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"reflect"
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)
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// ConnectContext to a database and verify with a ping.
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func ConnectContext(ctx context.Context, driverName, dataSourceName string) (*DB, error) {
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db, err := Open(driverName, dataSourceName)
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if err != nil {
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return db, err
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}
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err = db.PingContext(ctx)
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return db, err
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}
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// QueryerContext is an interface used by GetContext and SelectContext
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type QueryerContext interface {
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QueryContext(ctx context.Context, query string, args ...interface{}) (*sql.Rows, error)
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QueryxContext(ctx context.Context, query string, args ...interface{}) (*Rows, error)
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QueryRowxContext(ctx context.Context, query string, args ...interface{}) *Row
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}
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// PreparerContext is an interface used by PreparexContext.
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type PreparerContext interface {
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PrepareContext(ctx context.Context, query string) (*sql.Stmt, error)
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}
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// ExecerContext is an interface used by MustExecContext and LoadFileContext
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type ExecerContext interface {
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ExecContext(ctx context.Context, query string, args ...interface{}) (sql.Result, error)
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}
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// ExtContext is a union interface which can bind, query, and exec, with Context
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// used by NamedQueryContext and NamedExecContext.
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type ExtContext interface {
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binder
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QueryerContext
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ExecerContext
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}
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// SelectContext executes a query using the provided Queryer, and StructScans
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// each row into dest, which must be a slice. If the slice elements are
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// scannable, then the result set must have only one column. Otherwise,
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// StructScan is used. The *sql.Rows are closed automatically.
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// Any placeholder parameters are replaced with supplied args.
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func SelectContext(ctx context.Context, q QueryerContext, dest interface{}, query string, args ...interface{}) error {
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rows, err := q.QueryxContext(ctx, query, args...)
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if err != nil {
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return err
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}
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// if something happens here, we want to make sure the rows are Closed
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defer rows.Close()
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return scanAll(rows, dest, false)
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}
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// PreparexContext prepares a statement.
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//
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// The provided context is used for the preparation of the statement, not for
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// the execution of the statement.
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func PreparexContext(ctx context.Context, p PreparerContext, query string) (*Stmt, error) {
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s, err := p.PrepareContext(ctx, query)
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if err != nil {
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return nil, err
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}
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return &Stmt{Stmt: s, unsafe: isUnsafe(p), Mapper: mapperFor(p)}, err
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}
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// GetContext does a QueryRow using the provided Queryer, and scans the
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// resulting row to dest. If dest is scannable, the result must only have one
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// column. Otherwise, StructScan is used. Get will return sql.ErrNoRows like
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// row.Scan would. Any placeholder parameters are replaced with supplied args.
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// An error is returned if the result set is empty.
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func GetContext(ctx context.Context, q QueryerContext, dest interface{}, query string, args ...interface{}) error {
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r := q.QueryRowxContext(ctx, query, args...)
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return r.scanAny(dest, false)
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}
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// LoadFileContext exec's every statement in a file (as a single call to Exec).
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// LoadFileContext may return a nil *sql.Result if errors are encountered
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// locating or reading the file at path. LoadFile reads the entire file into
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// memory, so it is not suitable for loading large data dumps, but can be useful
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// for initializing schemas or loading indexes.
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//
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// FIXME: this does not really work with multi-statement files for mattn/go-sqlite3
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// or the go-mysql-driver/mysql drivers; pq seems to be an exception here. Detecting
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// this by requiring something with DriverName() and then attempting to split the
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// queries will be difficult to get right, and its current driver-specific behavior
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// is deemed at least not complex in its incorrectness.
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func LoadFileContext(ctx context.Context, e ExecerContext, path string) (*sql.Result, error) {
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realpath, err := filepath.Abs(path)
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if err != nil {
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return nil, err
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}
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contents, err := ioutil.ReadFile(realpath)
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if err != nil {
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return nil, err
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}
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res, err := e.ExecContext(ctx, string(contents))
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return &res, err
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}
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// MustExecContext execs the query using e and panics if there was an error.
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// Any placeholder parameters are replaced with supplied args.
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func MustExecContext(ctx context.Context, e ExecerContext, query string, args ...interface{}) sql.Result {
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res, err := e.ExecContext(ctx, query, args...)
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if err != nil {
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panic(err)
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}
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return res
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}
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// PrepareNamedContext returns an sqlx.NamedStmt
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func (db *DB) PrepareNamedContext(ctx context.Context, query string) (*NamedStmt, error) {
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return prepareNamedContext(ctx, db, query)
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}
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// NamedQueryContext using this DB.
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// Any named placeholder parameters are replaced with fields from arg.
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func (db *DB) NamedQueryContext(ctx context.Context, query string, arg interface{}) (*Rows, error) {
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return NamedQueryContext(ctx, db, query, arg)
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}
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// NamedExecContext using this DB.
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// Any named placeholder parameters are replaced with fields from arg.
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func (db *DB) NamedExecContext(ctx context.Context, query string, arg interface{}) (sql.Result, error) {
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return NamedExecContext(ctx, db, query, arg)
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}
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// SelectContext using this DB.
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// Any placeholder parameters are replaced with supplied args.
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func (db *DB) SelectContext(ctx context.Context, dest interface{}, query string, args ...interface{}) error {
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return SelectContext(ctx, db, dest, query, args...)
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}
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// GetContext using this DB.
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// Any placeholder parameters are replaced with supplied args.
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// An error is returned if the result set is empty.
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func (db *DB) GetContext(ctx context.Context, dest interface{}, query string, args ...interface{}) error {
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return GetContext(ctx, db, dest, query, args...)
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}
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// PreparexContext returns an sqlx.Stmt instead of a sql.Stmt.
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//
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// The provided context is used for the preparation of the statement, not for
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// the execution of the statement.
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func (db *DB) PreparexContext(ctx context.Context, query string) (*Stmt, error) {
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return PreparexContext(ctx, db, query)
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}
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// QueryxContext queries the database and returns an *sqlx.Rows.
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// Any placeholder parameters are replaced with supplied args.
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func (db *DB) QueryxContext(ctx context.Context, query string, args ...interface{}) (*Rows, error) {
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r, err := db.DB.QueryContext(ctx, query, args...)
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if err != nil {
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return nil, err
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}
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return &Rows{Rows: r, unsafe: db.unsafe, Mapper: db.Mapper}, err
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}
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// QueryRowxContext queries the database and returns an *sqlx.Row.
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// Any placeholder parameters are replaced with supplied args.
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func (db *DB) QueryRowxContext(ctx context.Context, query string, args ...interface{}) *Row {
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rows, err := db.DB.QueryContext(ctx, query, args...)
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return &Row{rows: rows, err: err, unsafe: db.unsafe, Mapper: db.Mapper}
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}
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// MustBeginTx starts a transaction, and panics on error. Returns an *sqlx.Tx instead
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// of an *sql.Tx.
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//
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// The provided context is used until the transaction is committed or rolled
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// back. If the context is canceled, the sql package will roll back the
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// transaction. Tx.Commit will return an error if the context provided to
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// MustBeginContext is canceled.
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func (db *DB) MustBeginTx(ctx context.Context, opts *sql.TxOptions) *Tx {
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tx, err := db.BeginTxx(ctx, opts)
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if err != nil {
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panic(err)
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}
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return tx
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}
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// MustExecContext (panic) runs MustExec using this database.
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// Any placeholder parameters are replaced with supplied args.
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func (db *DB) MustExecContext(ctx context.Context, query string, args ...interface{}) sql.Result {
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return MustExecContext(ctx, db, query, args...)
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}
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// BeginTxx begins a transaction and returns an *sqlx.Tx instead of an
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// *sql.Tx.
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//
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// The provided context is used until the transaction is committed or rolled
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// back. If the context is canceled, the sql package will roll back the
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// transaction. Tx.Commit will return an error if the context provided to
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// BeginxContext is canceled.
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func (db *DB) BeginTxx(ctx context.Context, opts *sql.TxOptions) (*Tx, error) {
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tx, err := db.DB.BeginTx(ctx, opts)
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if err != nil {
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return nil, err
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}
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return &Tx{Tx: tx, driverName: db.driverName, unsafe: db.unsafe, Mapper: db.Mapper}, err
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}
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// StmtxContext returns a version of the prepared statement which runs within a
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// transaction. Provided stmt can be either *sql.Stmt or *sqlx.Stmt.
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func (tx *Tx) StmtxContext(ctx context.Context, stmt interface{}) *Stmt {
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var s *sql.Stmt
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switch v := stmt.(type) {
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case Stmt:
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s = v.Stmt
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case *Stmt:
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s = v.Stmt
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case sql.Stmt:
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s = &v
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case *sql.Stmt:
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s = v
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default:
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panic(fmt.Sprintf("non-statement type %v passed to Stmtx", reflect.ValueOf(stmt).Type()))
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}
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return &Stmt{Stmt: tx.StmtContext(ctx, s), Mapper: tx.Mapper}
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}
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// NamedStmtContext returns a version of the prepared statement which runs
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// within a transaction.
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func (tx *Tx) NamedStmtContext(ctx context.Context, stmt *NamedStmt) *NamedStmt {
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return &NamedStmt{
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QueryString: stmt.QueryString,
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Params: stmt.Params,
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Stmt: tx.StmtxContext(ctx, stmt.Stmt),
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}
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}
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// MustExecContext runs MustExecContext within a transaction.
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// Any placeholder parameters are replaced with supplied args.
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func (tx *Tx) MustExecContext(ctx context.Context, query string, args ...interface{}) sql.Result {
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return MustExecContext(ctx, tx, query, args...)
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}
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// QueryxContext within a transaction and context.
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// Any placeholder parameters are replaced with supplied args.
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func (tx *Tx) QueryxContext(ctx context.Context, query string, args ...interface{}) (*Rows, error) {
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r, err := tx.Tx.QueryContext(ctx, query, args...)
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if err != nil {
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return nil, err
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}
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return &Rows{Rows: r, unsafe: tx.unsafe, Mapper: tx.Mapper}, err
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}
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// SelectContext within a transaction and context.
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// Any placeholder parameters are replaced with supplied args.
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func (tx *Tx) SelectContext(ctx context.Context, dest interface{}, query string, args ...interface{}) error {
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return SelectContext(ctx, tx, dest, query, args...)
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}
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// GetContext within a transaction and context.
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// Any placeholder parameters are replaced with supplied args.
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// An error is returned if the result set is empty.
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func (tx *Tx) GetContext(ctx context.Context, dest interface{}, query string, args ...interface{}) error {
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return GetContext(ctx, tx, dest, query, args...)
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}
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// QueryRowxContext within a transaction and context.
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// Any placeholder parameters are replaced with supplied args.
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func (tx *Tx) QueryRowxContext(ctx context.Context, query string, args ...interface{}) *Row {
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rows, err := tx.Tx.QueryContext(ctx, query, args...)
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return &Row{rows: rows, err: err, unsafe: tx.unsafe, Mapper: tx.Mapper}
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}
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// NamedExecContext using this Tx.
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// Any named placeholder parameters are replaced with fields from arg.
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func (tx *Tx) NamedExecContext(ctx context.Context, query string, arg interface{}) (sql.Result, error) {
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return NamedExecContext(ctx, tx, query, arg)
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}
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// SelectContext using the prepared statement.
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// Any placeholder parameters are replaced with supplied args.
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func (s *Stmt) SelectContext(ctx context.Context, dest interface{}, args ...interface{}) error {
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return SelectContext(ctx, &qStmt{s}, dest, "", args...)
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}
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// GetContext using the prepared statement.
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// Any placeholder parameters are replaced with supplied args.
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// An error is returned if the result set is empty.
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func (s *Stmt) GetContext(ctx context.Context, dest interface{}, args ...interface{}) error {
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return GetContext(ctx, &qStmt{s}, dest, "", args...)
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}
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// MustExecContext (panic) using this statement. Note that the query portion of
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// the error output will be blank, as Stmt does not expose its query.
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// Any placeholder parameters are replaced with supplied args.
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func (s *Stmt) MustExecContext(ctx context.Context, args ...interface{}) sql.Result {
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return MustExecContext(ctx, &qStmt{s}, "", args...)
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}
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// QueryRowxContext using this statement.
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// Any placeholder parameters are replaced with supplied args.
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func (s *Stmt) QueryRowxContext(ctx context.Context, args ...interface{}) *Row {
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qs := &qStmt{s}
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return qs.QueryRowxContext(ctx, "", args...)
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}
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// QueryxContext using this statement.
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// Any placeholder parameters are replaced with supplied args.
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func (s *Stmt) QueryxContext(ctx context.Context, args ...interface{}) (*Rows, error) {
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qs := &qStmt{s}
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return qs.QueryxContext(ctx, "", args...)
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}
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func (q *qStmt) QueryContext(ctx context.Context, query string, args ...interface{}) (*sql.Rows, error) {
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return q.Stmt.QueryContext(ctx, args...)
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}
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func (q *qStmt) QueryxContext(ctx context.Context, query string, args ...interface{}) (*Rows, error) {
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r, err := q.Stmt.QueryContext(ctx, args...)
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if err != nil {
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return nil, err
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}
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return &Rows{Rows: r, unsafe: q.Stmt.unsafe, Mapper: q.Stmt.Mapper}, err
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}
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func (q *qStmt) QueryRowxContext(ctx context.Context, query string, args ...interface{}) *Row {
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rows, err := q.Stmt.QueryContext(ctx, args...)
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return &Row{rows: rows, err: err, unsafe: q.Stmt.unsafe, Mapper: q.Stmt.Mapper}
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}
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func (q *qStmt) ExecContext(ctx context.Context, query string, args ...interface{}) (sql.Result, error) {
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return q.Stmt.ExecContext(ctx, args...)
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}
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