Ent Factory

A Model Instance Factory Code Generation Tool For Ent Go. 中文文档

Function

Simplify the process of creating mock model objects for ent schemas.

• Auto reading the struct of ent model schemas to create factory functions.
  • Support build-in type and imported type field.
  • PS: it will generate the imported type fields in default.
• Auto fake data for each field as default.
• Allow self define the value of any field independently by using function optional pattern.
• The ID field of table cannot be edited by default, so the with function and setter will not generated for the ID field.

Todo

• Unit Test Coverage
• Version Compatibility Test
• Read Foreign Key, Support Post Create Related Instance
• Improve Code Maintainability From B to A
• A CI config for self generating in CI/CD
• Code Lint Fix From C to B
• Provide Setter For No ReadOnly Imported Fields
• Better Format
  • Add A Blank Space Between With Functions. Fixed by adding doc for each function.
  • Import Sort by fmt rules. (Fix by exec.Command)
• Add documents for each function
• Generate imported fields have a switch to control
• Auto Format Code
• Support Time Optional Function
• Support Json Field Optional Function
• Add Code Lint
• CI Add Auto Lint
• Option param to control overwrite exist factory or not

Struct

-- cmd
    -- root.go
    -- generate.go  // main logic
-- constants
    -- constants.go
    -- errors.go
-- factories        // the test generate code in here
-- gen              // ent generate code in here
-- service          // simulate app and ent client for test
-- spec             // ent tables definition dir
-- main.go
-- README.md
-- Makefile

Requirement

• Golang 1.18～1.19
• Ent 0.10.0 - 0.11.4
• Faker 2.0

How to install

Install

go install golang.org/x/tools/cmd/goimports@latest
go install github.com/zaihui/ent-factory@latest

Setup

Flags

• schemaPath
  • path of your entschema, normally is "gen/entschema"
  • required
• outputPath
  • path of your factories
  • the endpoint must be "factories"
  • required
• projectPath
  • the relative path of this project
  • eg. github.com/zaihui/ent-factory
  • required
• overwrite
  • whether overwrite these exist files
  • the default value is false
• factoriesPath
  • the relative path of these factories located in this project
  • eg. factories, means projectPath/factories
  • the default value is factories
• appPath
  • the relative path of app client
  • eg. service/app means github.com/zaihui/ent-factory/service/app
  • the default value is service/app
• entClientName
  • the name of ent client, means appPath.entClientName
  • the default value is EntClient
• genImportFields
  • the bool value to set whether generate those imported fields of the models
  • the default value is true

Makefile Command

CAUTION!: This Command will NOT regenerate every factory based on the current struct of table in default.

If you want to Regenerate, please use the overwrite flag. Or delete what you want to regenerate then use this command.

all_factory:
  go run ent-factory generate --schemaPath {your ent schema path} --outputPath {path of your factories} ----projectPath {your project module path}

Sample

all_factory:
  go run ent-factory generate --schemaPath gen/entschema --outputPath  /Users/lvxinyan/zaihui/ent-factory/factories --projectPath github.com/zaihui/ent-factory
## for one factory
ent-factory generate --schemaFile gen/entschema/{one ent model file}.go --outputPath  /Users/lvxinyan/zaihui/ent-factory/factories --projectPath github.com/zaihui/ent-factory

Sample

The sample of a factory

package booktableorderfactory

import (
	"github.com/bxcodec/faker"
	"github/zaihui/ent-factory/factories"
	"github/zaihui/ent-factory/gen/entschema"
	"github/zaihui/ent-factory/service/app"
)

type BookTableOrderFieldSetter func(*entschema.BookTableOrder)


func SetUID(uIDGen string) BookTableOrderFieldSetter {
	return func(bookTableOrderGen *entschema.BookTableOrder) {
		bookTableOrderGen.UID = uIDGen
	}
}

func SetUserUID(userUIDGen string) BookTableOrderFieldSetter {
	return func(bookTableOrderGen *entschema.BookTableOrder) {
		bookTableOrderGen.UserUID = userUIDGen
	}
}
func SetOrderNo(orderNoGen string) BookTableOrderFieldSetter {
	return func(bookTableOrderGen *entschema.BookTableOrder) {
		bookTableOrderGen.OrderNo = orderNoGen
	}
}
func SetType(typeGen string) BookTableOrderFieldSetter {
	return func(bookTableOrderGen *entschema.BookTableOrder) {
		bookTableOrderGen.Type = typeGen
	}
}

func New(s factories.TestSuite, opts ...BookTableOrderFieldSetter) *entschema.BookTableOrder {
	data := entschema.BookTableOrder{}
	s.NoError(faker.FakeData(&data))
	for _, opt := range opts {
		opt(&data)
	}
	return app.EntClient.BookTableOrder.Create().
		SetUID(data.UID).
		SetUserUID(data.UserUID).
		SetOrderNo(data.OrderNo).
		SetType(data.Type).
		SaveX(s.Context())
}

How to use this factory

package main
import (
	your_location_of_factories/booktableorderfactory
)
// s is an instance of test suite
order := booktableorderfactory.new(s) 
// if you want to customize the value of a field, eg. UID
order2: = booktableorderfactory.new(s, booktableorderfactory.SetUID("your uid"))

Special Thank

Special Thanks splunk. The part of codegen about function optional pattern is based on this project from splunk.

I edit some logic of it to implement my reqirements, so I haven't imported it as a package to use it.

How to contribute

Process

1. Fork this repo
2. Clone your repo to local
3. Create a branch based on master
4. Add your code
5. You can use the make self_test to test your code. It will build this package, then generate code for the table in spec/schema.
6. Use make fmt format your code, and use make lint to check the code styles.
7. Follow the base rule to create a pull request, happy coding!

Base Rule

1. PR only can have one commit, and it needs to rebase the master branch
2. It must have UTs, if it is possible.
3. Commit Message must fit the format.

EF-{Number}(label): title
label:
- feat, for feature
- fix, for bug fix
- ut, for ut
- doc, for document
- refactor, for refactor code

Happy Coding, Happy Sharing!