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dao.go
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dao.go
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// Copyright 2021 lack
//
// MIT License
//
// Copyright (c) 2020 Lack
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
package dao
import (
"context"
"database/sql"
"fmt"
"github.com/lack-io/vine/lib/dao/clause"
"github.com/lack-io/vine/lib/dao/schema"
)
// Dialect DAO database dialect
type Dialect interface {
Init(...Option) error
Options() Options
NewTx() *DB
Migrator() Migrator
DataTypeOf(*schema.Field) string
DefaultValueOf(*schema.Field) clause.Expression
BindVarTo(writer clause.Writer, stmt *Statement, v interface{})
QuoteTo(clause.Writer, string)
Explain(sql string, vars ...interface{}) string
JSONBuild(column string) JSONQuery
JSONDataType() string
String() string
}
// ConnPool db conns pool interface
type ConnPool interface {
PrepareContext(ctx context.Context, query string) (*sql.Stmt, error)
ExecContext(ctx context.Context, query string, args ...interface{}) (sql.Result, error)
QueryContext(ctx context.Context, query string, args ...interface{}) (*sql.Rows, error)
QueryRowContext(ctx context.Context, query string, args ...interface{}) *sql.Row
}
// SavePointerDialectorInterface save pointer interface
type SavePointerDialectorInterface interface {
SavePoint(tx *DB, name string) error
RollbackTo(tx *DB, name string) error
}
type TxBeginner interface {
BeginTx(ctx context.Context, opts *sql.TxOptions) (*sql.Tx, error)
}
type ConnPoolBeginner interface {
BeginTx(ctx context.Context, opts *sql.TxOptions) (ConnPool, error)
}
type TxCommitter interface {
Commit() error
Rollback() error
}
// Valuer dao valuer interface
type Valuer interface {
DaoValue(context.Context, *DB) clause.Expr
}
type JSONOp int32
const (
JSONHasKey JSONOp = iota + 1 // JSON Key
JSONEq // ==
JSONNeq // <>
JSONGt // >
JSONGte // >=
JSONLt // <
JSONLte // <=
JSONLike // like
)
func (j JSONOp) String() string {
switch j {
case JSONHasKey:
return " IS NOT NULL"
case JSONEq:
return "="
case JSONNeq:
return "<>"
case JSONGte:
return ">="
case JSONGt:
return ">"
case JSONLte:
return "<="
case JSONLt:
return "<"
case JSONLike:
return "LIKE"
default:
return fmt.Sprintf("%d", j)
}
}
// JSONQuery query column as json
type JSONQuery interface {
Op(op JSONOp, value interface{}, keys ...string) JSONQuery
Contains(op JSONOp, values interface{}, keys ...string) JSONQuery
Tx(tx *DB) JSONQuery
Build(builder clause.Builder)
}
var (
DefaultDialect Dialect
)