Ent

    Ent is an easy-to-use ORM which developed by Facebook. Here is a brief guide to use this library.

    Add two fields name、age to User table.

    1. package schema
    3. import (
    4.     "entgo.io/ent"
    5.     "entgo.io/ent/schema/field"
    6. )
    8. // Fields of the User.
    9. func (User) Fields() []ent.Field {
    10.         field.Int("age").
    12.         field.String("name").
    13.             Default("unknown"),
    14.     }
    15. }

    First, create a new ent.Client. We use SQLite3 here for demonstration.

    1. package main
    3. import (
    4.     "context"
    5.     "log"
    7.     "<project>/ent"
    9. )
    11. func main() {
    12.     client, err := ent.Open("sqlite3", "file:ent?mode=memory&cache=shared&_fk=1")
    13.     if err != nil {
    14.         log.Fatalf("failed opening connection to sqlite: %v", err)
    15.     }
    16.     defer client.Close()
    17.     // Run the auto migration tool.
    18.     if err := client.Schema.Create(context.Background()); err != nil {
    19.         log.Fatalf("failed creating schema resources: %v", err)
    20.     }
    21. }