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178 lines
5.2 KiB
Go
178 lines
5.2 KiB
Go
// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
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//
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// This Source Code Form is subject to the terms of the MIT License.
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// If a copy of the MIT was not distributed with this file,
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// You can obtain one at https://github.com/gogf/gf.
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//
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// Note:
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// 1. It needs manually import: _ "github.com/mattn/go-sqlite3"
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// 2. It does not support Save/Replace features.
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// Package sqlite implements gdb.Driver, which supports operations for SQLite.
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package sqlite
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import (
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_ "github.com/mattn/go-sqlite3"
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"context"
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"database/sql"
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"fmt"
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"strings"
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"github.com/gogf/gf/v2/container/gmap"
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"github.com/gogf/gf/v2/database/gdb"
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"github.com/gogf/gf/v2/errors/gcode"
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"github.com/gogf/gf/v2/errors/gerror"
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"github.com/gogf/gf/v2/os/gfile"
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"github.com/gogf/gf/v2/text/gstr"
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)
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// DriverSqlite is the driver for sqlite database.
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type DriverSqlite struct {
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*gdb.Core
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}
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var (
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// tableFieldsMap caches the table information retrieved from database.
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tableFieldsMap = gmap.New(true)
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)
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func init() {
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if err := gdb.Register(`sqlite`, New()); err != nil {
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panic(err)
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}
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}
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// New create and returns a driver that implements gdb.Driver, which supports operations for SQLite.
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func New() gdb.Driver {
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return &DriverSqlite{}
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}
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// New creates and returns a database object for sqlite.
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// It implements the interface of gdb.Driver for extra database driver installation.
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func (d *DriverSqlite) New(core *gdb.Core, node *gdb.ConfigNode) (gdb.DB, error) {
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return &DriverSqlite{
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Core: core,
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}, nil
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}
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// Open creates and returns a underlying sql.DB object for sqlite.
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func (d *DriverSqlite) Open(config *gdb.ConfigNode) (db *sql.DB, err error) {
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var (
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source string
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underlyingDriverName = "sqlite3"
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)
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if config.Link != "" {
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source = config.Link
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} else {
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source = config.Name
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}
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// It searches the source file to locate its absolute path..
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if absolutePath, _ := gfile.Search(source); absolutePath != "" {
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source = absolutePath
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}
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if db, err = sql.Open(underlyingDriverName, source); err != nil {
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err = gerror.WrapCodef(
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gcode.CodeDbOperationError, err,
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`sql.Open failed for driver "%s" by source "%s"`, underlyingDriverName, source,
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)
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return nil, err
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}
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return
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}
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// FilteredLink retrieves and returns filtered `linkInfo` that can be using for
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// logging or tracing purpose.
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func (d *DriverSqlite) FilteredLink() string {
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return d.GetConfig().Link
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}
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// GetChars returns the security char for this type of database.
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func (d *DriverSqlite) GetChars() (charLeft string, charRight string) {
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return "`", "`"
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}
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// DoFilter deals with the sql string before commits it to underlying sql driver.
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func (d *DriverSqlite) DoFilter(ctx context.Context, link gdb.Link, sql string, args []interface{}) (newSql string, newArgs []interface{}, err error) {
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return d.Core.DoFilter(ctx, link, sql, args)
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}
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// Tables retrieves and returns the tables of current schema.
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// It's mainly used in cli tool chain for automatically generating the models.
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func (d *DriverSqlite) Tables(ctx context.Context, schema ...string) (tables []string, err error) {
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var result gdb.Result
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link, err := d.SlaveLink(schema...)
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if err != nil {
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return nil, err
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}
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result, err = d.DoGetAll(ctx, link, `SELECT NAME FROM SQLITE_MASTER WHERE TYPE='table' ORDER BY NAME`)
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if err != nil {
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return
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}
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for _, m := range result {
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for _, v := range m {
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tables = append(tables, v.String())
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}
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}
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return
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}
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// TableFields retrieves and returns the fields' information of specified table of current schema.
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//
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// Also see DriverMysql.TableFields.
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func (d *DriverSqlite) TableFields(ctx context.Context, table string, schema ...string) (fields map[string]*gdb.TableField, err error) {
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charL, charR := d.GetChars()
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table = gstr.Trim(table, charL+charR)
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if gstr.Contains(table, " ") {
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return nil, gerror.NewCode(gcode.CodeInvalidParameter, "function TableFields supports only single table operations")
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}
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useSchema := d.GetSchema()
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if len(schema) > 0 && schema[0] != "" {
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useSchema = schema[0]
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}
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v := tableFieldsMap.GetOrSetFuncLock(
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fmt.Sprintf(`sqlite_table_fields_%s_%s@group:%s`, table, useSchema, d.GetGroup()),
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func() interface{} {
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var (
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result gdb.Result
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link gdb.Link
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)
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if link, err = d.SlaveLink(useSchema); err != nil {
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return nil
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}
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result, err = d.DoGetAll(ctx, link, fmt.Sprintf(`PRAGMA TABLE_INFO(%s)`, table))
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if err != nil {
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return nil
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}
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fields = make(map[string]*gdb.TableField)
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for i, m := range result {
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fields[strings.ToLower(m["name"].String())] = &gdb.TableField{
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Index: i,
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Name: strings.ToLower(m["name"].String()),
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Type: strings.ToLower(m["type"].String()),
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}
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}
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return fields
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},
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)
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if v != nil {
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fields = v.(map[string]*gdb.TableField)
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}
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return
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}
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// DoInsert is not supported in sqlite.
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func (d *DriverSqlite) DoInsert(ctx context.Context, link gdb.Link, table string, list gdb.List, option gdb.DoInsertOption) (result sql.Result, err error) {
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switch option.InsertOption {
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case gdb.InsertOptionSave:
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return nil, gerror.NewCode(gcode.CodeNotSupported, `Save operation is not supported by sqlite driver`)
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case gdb.InsertOptionReplace:
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return nil, gerror.NewCode(gcode.CodeNotSupported, `Replace operation is not supported by sqlite driver`)
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default:
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return d.Core.DoInsert(ctx, link, table, list, option)
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}
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}
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