builder_standard.go

// Copyright 2016 Qiang Xue. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.

package dbx

// StandardBuilder is the builder that is used by DB for an unknown driver.
type StandardBuilder struct {
	*BaseBuilder
	qb *BaseQueryBuilder
}

var _ Builder = &StandardBuilder{}

// NewStandardBuilder creates a new StandardBuilder instance.
func NewStandardBuilder(db *DB, executor Executor) Builder {
	return &StandardBuilder{
		NewBaseBuilder(db, executor),
		NewBaseQueryBuilder(db),
	}
}

// QueryBuilder returns the query builder supporting the current DB.
func (b *StandardBuilder) QueryBuilder() QueryBuilder {
	return b.qb
}

// Select returns a new SelectQuery object that can be used to build a SELECT statement.
// The parameters to this method should be the list column names to be selected.
// A column name may have an optional alias name. For example, Select("id", "my_name AS name").
func (b *StandardBuilder) Select(cols ...string) *SelectQuery {
	return NewSelectQuery(b, b.db).Select(cols...)
}

// Model returns a new ModelQuery object that can be used to perform model-based DB operations.
// The model passed to this method should be a pointer to a model struct.
func (b *StandardBuilder) Model(model interface{}) *ModelQuery {
	return NewModelQuery(model, b.db.FieldMapper, b.db, b)
}