sqly

README

sqly

---

An easy-to-use extension for sqlx ，base on xml files and named query/exec

this repo is under development, please do not use it in production.

install

go get github.com/nvac/sqly

Usage

1. set database config in xml file

• name: needs to be unique in same environment
• environment: custom string，runtime environment
• source: data source name
• connMaxLifetime(seconds): sets the maximum amount of time a connection may be reused. . if default values is required, remove the attr
• connMaxIdleTime(seconds): sets the maximum amount of time a connection may be idle. if default values is required, remove the attr
• maxIdleConns: sets the maximum number of connections in the idle connection pool. if default values is required, remove the attr
• maxOpenConns: sets the maximum number of open connections to the database. if default values is required, remove the attr

<?xml version="1.0" encoding="utf-8" ?>

<databases>
    <database name="ReadDb"
              environment="development"
              driver="mysql"
              source="user:password@tcp(127.0.0.1:3306)/test?charset=utf8mb4&amp;parseTime=True"
              connMaxLifetime="30"
              connMaxIdleTime="30"
              maxIdleConns="2"
              maxOpenConns="10"
    />
    
    <database name="WriteDb"
              environment="development"
              driver="mysql"
              source="user:password@tcp(127.0.0.1:3306)/test?charset=utf8mb4&amp;parseTime=True"
              connMaxLifetime="30"
              connMaxIdleTime="30"
              maxIdleConns="2"
              maxOpenConns="10"
    />
</database>

2. write sql script in xml file

• name: needs to be unique
• database: using the above configured database
• content: ensure in CDATA

<?xml version="1.0" encoding="utf-8" ?>

<scripts>
    <script name="GetUser" database="ReadDb">
        <![CDATA[
            SELECT username, password
            FROM `user`
            WHERE username = :username
        ]]>
    </script>

    <script name="ListUser" database="ReadDb">
        <![CDATA[
            SELECT username, password
            FROM `user`
            LIMIT 10 OFFSET 0
        ]]>
    </script>
    
    <script name="AddUser" database="WriteDb">
        <![CDATA[
            INSERT INTO user (username, password)
            VALUES (:username, :password)
        ]]>
    </script>
</scripts>

1. inti & use sqly

package main

import (
	"fmt"
	_ "github.com/go-sql-driver/mysql"
	"os"
)

type User struct {
	Username string `db:"username"`
	Password string `db:"password"`
}

func main() {
	err := sqly.Init(&Config{
		DatabasesFile:    "config/databases.xml",
		ScriptsGlobFiles: "config/scripts/*.xml",
		Environment:      os.Getenv("Environment"),
		SourceDecryptFunc: func(source string) string {
			return source
		},
	})

	if err != nil {
		panic(err)
	}

	var user User
	if err := sqly.QueryRow("GetUser", &user, map[string]interface{}{
		"username": "lisa",
	}); err != nil {
		panic(err)
	} else {
		fmt.Println(user)
	}

	var users []User
	if err := sqly.QueryRows("ListUser", &users, map[string]interface{}{}); err != nil {
		panic(err)
	} else {
		fmt.Println(users)
	}

	if result, err := sqly.Exec("AddUser", map[string]interface{}{
	    "username": "root",
		"password": "123456",
	}); err != nil {
		panic(err)
    } else {
		fmt.Println(result.RowsAffected())
		fmt.Println(result.LastInsertId())
    }
}

License

MIT © nvac

Documentation

Index

• func Exec(name string, arg interface{}) (sql.Result, error)
• func Init(config *Config) error
• func QueryRow(name string, dest interface{}, arg interface{}) error
• func QueryRows(name string, dest interface{}, arg interface{}) error
• type Config

Functions

func Exec

func Exec(name string, arg interface{}) (sql.Result, error)

func Init

func Init(config *Config) error

func QueryRow

func QueryRow(name string, dest interface{}, arg interface{}) error

func QueryRows

func QueryRows(name string, dest interface{}, arg interface{}) error

Types

type Config

type Config struct {
	DatabasesFile     string
	ScriptsGlobFiles  string
	Environment       string
	SourceDecryptFunc func(source string) string
}