bigpigeon

toyorm v0.3.1-alpha add join query

now toyorm support join operation

yes, codegen have better performance than reflect

but I think text/template to generate code is not really good

it hard to read and error-prone

it is more like a powerful c-macro

I think use go/ast to implement c++ likes template is other way

when you want to make complex sql,toyorm maybe word better

find the name = "tom" user and it subquery blog title = "first blog" e.g

  brick := toy.Model(&User{}).Where("=",Offsetof(User{}.Name),"tom").
			Preload(Offsetof(User{}.Blog)).Where("=", Offsetof(Blog{}.Title), "first blog").Enter()

  brick.Find(&user)
  // raw sql
  // select id,name,data, from user where name = "tom" limit 1
  // select id,title,content,user_id from blog where user_id = @user.id and title = "first blog"

toyorm select field with Offsetof, it better when you want to refactor struct field name and you can operation main query as sub query

In "OneToOne" and "BelongTo" Join is match but in "ManyToMany" and "OneToMany" will generate duplicate data

I think add Join method and only support "One Data" preload is good way

you means use join to query and output data as table? otherwise I think “eager fetching” is better way

preload: data association exec/query template exec: custom exec/query this is my orm great features