Add forgotten ctx methods for DeleteBuilder (#246)

Signed-off-by: Pierre Fenoll <pierrefenoll@gmail.com>

delete_ctx.go

@@ -20,8 +20,50 @@ func (d *deleteData) ExecContext(ctx context.Context) (sql.Result, error) {
 	return ExecContextWith(ctx, ctxRunner, d)
 }
 
+func (d *deleteData) QueryContext(ctx context.Context) (*sql.Rows, error) {
+	if d.RunWith == nil {
+		return nil, RunnerNotSet
+	}
+	ctxRunner, ok := d.RunWith.(QueryerContext)
+	if !ok {
+		return nil, NoContextSupport
+	}
+	return QueryContextWith(ctx, ctxRunner, d)
+}
+
+func (d *deleteData) QueryRowContext(ctx context.Context) RowScanner {
+	if d.RunWith == nil {
+		return &Row{err: RunnerNotSet}
+	}
+	queryRower, ok := d.RunWith.(QueryRowerContext)
+	if !ok {
+		if _, ok := d.RunWith.(QueryerContext); !ok {
+			return &Row{err: RunnerNotQueryRunner}
+		}
+		return &Row{err: NoContextSupport}
+	}
+	return QueryRowContextWith(ctx, queryRower, d)
+}
+
 // ExecContext builds and ExecContexts the query with the Runner set by RunWith.
 func (b DeleteBuilder) ExecContext(ctx context.Context) (sql.Result, error) {
 	data := builder.GetStruct(b).(deleteData)
 	return data.ExecContext(ctx)
 }
+
+// QueryContext builds and QueryContexts the query with the Runner set by RunWith.
+func (b DeleteBuilder) QueryContext(ctx context.Context) (*sql.Rows, error) {
+	data := builder.GetStruct(b).(deleteData)
+	return data.QueryContext(ctx)
+}
+
+// QueryRowContext builds and QueryRowContexts the query with the Runner set by RunWith.
+func (b DeleteBuilder) QueryRowContext(ctx context.Context) RowScanner {
+	data := builder.GetStruct(b).(deleteData)
+	return data.QueryRowContext(ctx)
+}
+
+// ScanContext is a shortcut for QueryRowContext().Scan.
+func (b DeleteBuilder) ScanContext(ctx context.Context, dest ...interface{}) error {
+	return b.QueryRowContext(ctx).Scan(dest...)
+}

delete_ctx_test.go

@@ -16,11 +16,26 @@ func TestDeleteBuilderContextRunners(t *testing.T) {
 
 	b.ExecContext(ctx)
 	assert.Equal(t, expectedSql, db.LastExecSql)
+
+	b.QueryContext(ctx)
+	assert.Equal(t, expectedSql, db.LastQuerySql)
+
+	b.QueryRowContext(ctx)
+	assert.Equal(t, expectedSql, db.LastQueryRowSql)
+
+	err := b.ScanContext(ctx)
+	assert.NoError(t, err)
 }
 
 func TestDeleteBuilderContextNoRunner(t *testing.T) {
-	b := Delete("test")
+	b := Delete("test").Where("x != ?", 0).Suffix("RETURNING x")
 
 	_, err := b.ExecContext(ctx)
 	assert.Equal(t, RunnerNotSet, err)
+
+	_, err = b.QueryContext(ctx)
+	assert.Equal(t, RunnerNotSet, err)
+
+	err = b.ScanContext(ctx)
+	assert.Equal(t, RunnerNotSet, err)
 }