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bd07c86b60
Summary: Used addlicense to generate this: addlicense -c "Facebook Inc" -f license_header . example was taken from: https://github.com/facebook/litho/blob/master/lib/soloader/BUCK Reviewed By: alexsn Differential Revision: D17070152 fbshipit-source-id: e7b91398d7f6181727be3400c1872ad5f28e38ed
72 lines
1.7 KiB
Go
72 lines
1.7 KiB
Go
// Copyright 2019-present Facebook Inc. All rights reserved.
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// This source code is licensed under the Apache 2.0 license found
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// in the LICENSE file in the root directory of this source tree.
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package main
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import (
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"context"
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"fmt"
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"log"
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"time"
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"github.com/facebookincubator/ent/examples/o2o2types/ent"
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"github.com/facebookincubator/ent/dialect/sql"
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_ "github.com/mattn/go-sqlite3"
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)
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func main() {
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db, err := sql.Open("sqlite3", "file:o2o2types?mode=memory&cache=shared&_fk=1")
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if err != nil {
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log.Fatalf("failed opening connection to sqlite: %v", err)
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}
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defer db.Close()
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client := ent.NewClient(ent.Driver(db))
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ctx := context.Background()
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// run the auto migration tool.
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if err := client.Schema.Create(ctx); err != nil {
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log.Fatalf("failed creating schema resources: %v", err)
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}
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if err := Do(ctx, client); err != nil {
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log.Fatal(err)
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}
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}
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func Do(ctx context.Context, client *ent.Client) error {
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a8m, err := client.User.
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Create().
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SetAge(30).
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SetName("Mashraki").
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Save(ctx)
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if err != nil {
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return fmt.Errorf("creating user: %v", err)
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}
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log.Println("user:", a8m)
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card1, err := client.Card.
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Create().
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SetOwner(a8m).
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SetNumber("1020").
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SetExpired(time.Now().Add(time.Minute)).
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Save(ctx)
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if err != nil {
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return fmt.Errorf("creating card: %v", err)
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}
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log.Println("card:", card1)
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// Only returns the card of the user,
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// and expects that there's only one.
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card2, err := a8m.QueryCard().Only(ctx)
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if err != nil {
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return fmt.Errorf("querying card: %v", err)
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}
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log.Println("card:", card2)
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// The Card entity is able to query its owner using
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// its back-reference.
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owner, err := card2.QueryOwner().Only(ctx)
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if err != nil {
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return fmt.Errorf("querying owner: %v", err)
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}
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log.Println("owner:", owner)
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return nil
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}
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