ggorm

README

ggorm

ggorm library wrapped in gorm, with added features such as tracer, paging queries, etc.

Support mysql, postgresql, tidb, clickhouse, sqlite.

Example of use

Initializing the connection

    import (
        "gitee.com/yzsunjianguo/common_pkg/ggorm"
    )

    var dsn = "root:123456@(192.168.1.6:3306)/test?charset=utf8mb4&parseTime=True&loc=Local"

    // (1) connect to the database using the default settings
    db, err := ggorm.InitMysql(dsn)

    // (2) customised settings to connect to the database
    db, err := ggorm.Init(
        dsn,
        ggorm.WithLogging(logger.Get()),  // print log
        ggorm.WithLogRequestIDKey("request_id"),  // print request_id
        ggorm.WithMaxIdleConns(5),
        ggorm.WithMaxOpenConns(50),
        ggorm.WithConnMaxLifetime(time.Minute*3),
        // ggorm.WithSlowThreshold(time.Millisecond*100),  // only print logs that take longer than 100 milliseconds to execute
        // ggorm.WithEnableTrace(),  // enable tracing
        // ggorm.WithRWSeparation(SlavesDsn, MastersDsn...)  // read-write separation
        // ggorm.WithGormPlugin(yourPlugin)  // custom gorm plugin
    )

Model

package model

import (
	"gitee.com/yzsunjianguo/common_pkg/ggorm"
)

// UserExample object fields mapping table
type UserExample struct {
	ggorm.Model `gorm:"embedded"`

	Name   string `gorm:"type:varchar(40);unique_index;not null" json:"name"`
	Age    int    `gorm:"not null" json:"age"`
	Gender string `gorm:"type:varchar(10);not null" json:"gender"`
}

// TableName get table name
func (table *UserExample) TableName() string {
	return gorm.GetTableName(table)
}

Transaction

    func createUser() error {
        // note that you should use tx as the database handle when you are in a transaction
        tx := db.Begin()
        defer func() {
            if err := recover(); err != nil { // rollback after a panic during transaction execution
                tx.Rollback()
                fmt.Printf("transaction failed, err = %v\n", err)
            }
        }()

        var err error
        if err = tx.Error; err != nil {
            return err
        }

        if err = tx.Where("id = ?", 1).First(table).Error; err != nil {
            tx.Rollback()
            return err
        }

        panic("mock panic")

        if err = tx.Create(&userExample{Name: "Mr Li", Age: table.Age + 2, Gender: "male"}).Error; err != nil {
            tx.Rollback()
            return err
        }

        return tx.Commit().Error
    }

gorm User Guide

• https://gorm.io/zh_CN/docs/index.html

Documentation

Overview

Package ggorm is a library wrapped on top of gorm.io/gorm, with added features such as link tracing, paging queries, etc.

Index

• func GetTableName(object interface{}) string
• func InitMysql(dsn string, opts ...Option) (*gorm.DB, error)
• func InitPostgresql(dsn string, opts ...Option) (*gorm.DB, error)
• func InitTidb(dsn string, opts ...Option) (*gorm.DB, error)
• func NewCustomGormLogger(o *options) logger.Interface
• type KV
• type Model
• type Model2
• type Option
  • func WithConnMaxLifetime(t time.Duration) Option
  • func WithEnableForeignKey() Option
  • func WithEnableTrace() Option
  • func WithGormPlugin(plugins ...gorm.Plugin) Option
  • func WithLogRequestIDKey(key string) Option
  • func WithLogging(l *zap.Logger, level ...logger.LogLevel) Option
  • func WithMaxIdleConns(size int) Option
  • func WithMaxOpenConns(size int) Option
  • func WithRWSeparation(slavesDsn []string, mastersDsn ...string) Option
  • func WithSlowThreshold(d time.Duration) Option

Functions

func GetTableName

func GetTableName(object interface{}) string

GetTableName get table name

func InitMysql

func InitMysql(dsn string, opts ...Option) (*gorm.DB, error)

InitMysql init mysql or tidb

func InitPostgresql

func InitPostgresql(dsn string, opts ...Option) (*gorm.DB, error)

InitPostgresql init postgresql

func InitTidb

func InitTidb(dsn string, opts ...Option) (*gorm.DB, error)

InitTidb init tidb

func NewCustomGormLogger

func NewCustomGormLogger(o *options) logger.Interface

NewCustomGormLogger custom gorm logger

Types

type KV

type KV = map[string]interface{}

KV map type

type Model

type Model struct {
	ID        uint64         `gorm:"column:id;AUTO_INCREMENT;primary_key" json:"id"`
	CreatedAt time.Time      `gorm:"column:created_at" json:"createdAt"`
	UpdatedAt time.Time      `gorm:"column:updated_at" json:"updatedAt"`
	DeletedAt gorm.DeletedAt `gorm:"column:deleted_at;index" json:"-"`
}

Model embedded structs, add `gorm: "embedded"` when defining table structs

type Model2

type Model2 struct {
	ID        uint64         `gorm:"column:id;AUTO_INCREMENT;primary_key" json:"id"`
	CreatedAt time.Time      `gorm:"column:created_at" json:"created_at"`
	UpdatedAt time.Time      `gorm:"column:updated_at" json:"updated_at"`
	DeletedAt gorm.DeletedAt `gorm:"column:deleted_at;index" json:"-"`
}

Model2 embedded structs, json tag named is snake case

type Option

type Option func(*options)

Option set the mysql options.

func WithConnMaxLifetime

func WithConnMaxLifetime(t time.Duration) Option

WithConnMaxLifetime set conn max lifetime

func WithEnableForeignKey

func WithEnableForeignKey() Option

WithEnableForeignKey use foreign keys

func WithEnableTrace

func WithEnableTrace() Option

WithEnableTrace use trace

func WithGormPlugin

func WithGormPlugin(plugins ...gorm.Plugin) Option

WithGormPlugin setting gorm plugin

func WithLogRequestIDKey

func WithLogRequestIDKey(key string) Option

WithLogRequestIDKey log request id

func WithLogging

func WithLogging(l *zap.Logger, level ...logger.LogLevel) Option

WithLogging set log sql, If l=nil, the gorm log library will be used

func WithMaxIdleConns

func WithMaxIdleConns(size int) Option

WithMaxIdleConns set max idle conns

func WithMaxOpenConns

func WithMaxOpenConns(size int) Option

WithMaxOpenConns set max open conns

func WithRWSeparation

func WithRWSeparation(slavesDsn []string, mastersDsn ...string) Option

WithRWSeparation setting read-write separation

func WithSlowThreshold

func WithSlowThreshold(d time.Duration) Option

WithSlowThreshold Set sql values greater than the threshold