10000 entc/integration: example for multischema in migration by a8m · Pull Request #2804 · ent/ent · GitHub
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Jul 27, 2022
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entc/integration: example for multischema in migration #2804

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69 changes: 35 additions & 34 deletions entc/integration/multischema/multischema_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -6,20 +6,19 @@ package multischema

import (
"context"
"strings"
"testing"

"entgo.io/ent/dialect 10000 "
"entgo.io/ent/dialect/sql"
"entgo.io/ent/dialect/sql/schema"
"entgo.io/ent/entc/integration/multischema/ent"
"entgo.io/ent/entc/integration/multischema/ent/group"
"entgo.io/ent/entc/integration/multischema/ent/migrate"
"entgo.io/ent/entc/integration/multischema/ent/pet"
"entgo.io/ent/entc/integration/multischema/ent/user"
"github.com/stretchr/testify/require"

atlas "ariga.io/atlas/sql/schema"
_ "github.com/go-sql-driver/mysql"
"github.com/stretchr/testify/require"
)

func TestMySQL(t *testing.T) {
Expand All @@ -33,14 +32,27 @@ func TestMySQL(t *testing.T) {
require.NoError(t, err, "creating database")
defer db.ExecContext(ctx, "DROP DATABASE IF EXISTS db1")
defer db.ExecContext(ctx, "DROP DATABASE IF EXISTS db2")
setupSchema(t, db)

client := ent.NewClient(ent.Driver(db), ent.AlternateSchema(ent.SchemaConfig{
Pet: "db1",
User: "db2",
Group: "db1",
// Default schema for the connection is db1.
db1, err := sql.Open("mysql", "root:pass@tcp(localhost:3308)/db1")
require.NoError(t, err)
defer db1.Close()

cfg := ent.SchemaConfig{
// The "users" and the "pets" table reside in the same schema
// as the connection (the default search schema). Thus, there
// is no need to set them explicitly both in the migration and
// runtime statements.
//
// Pet: "db1",
// User: "db1",

// The "groups" and "group_users" reside in external schema (db2).
Group: "db2",
GroupUsers: "db2",
}))
}
client := ent.NewClient(ent.Driver(db1), ent.AlternateSchema(cfg))
setupSchema(t, client, cfg)
pedro := client.Pet.Create().SetName("Pedro").SaveX(ctx)
groups := client.Group.CreateBulk(
client.Group.Create().SetName("GitHub"),
Expand Down Expand Up @@ -108,30 +120,19 @@ func TestMySQL(t *testing.T) {
require.Equal(t, client.Pet.Query().CountX(ctx), len(client.Pet.Query().AllX(ctx)))
}

func setupSchema(t *testing.T, drv *sql.Driver) {
client := ent.NewClient(ent.Driver(&rewriter{drv}))
err := client.Schema.Create(context.Background(), migrate.WithForeignKeys(false), schema.WithAtlas(false))
func setupSchema(t *testing.T, client *ent.Client, cfg ent.SchemaConfig) {
err := client.Schema.Create(
context.Background(),
migrate.WithForeignKeys(false),
schema.WithDiffHook(func(next schema.Differ) schema.Differ {
return schema.DiffFunc(func(current, desired *atlas.Schema) ([]atlas.Change, error) {
for tt, s := range map[string]string{group.Table: cfg.Group, group.UsersTable: cfg.GroupUsers} {
t1, ok := desired.Table(tt)
require.True(t, ok)
t1.SetSchema(atlas.New(s))
}
return next.Diff(current, desired)
})
}))
require.NoError(t, err)
}

type rewriter struct {
dialect.Driver
}

func (r *rewriter) Tx(ctx context.Context) (dialect.Tx, error) {
tx, err := r.Driver.Tx(ctx)
if err != nil {
return nil, err
}
return &txRewriter{tx}, nil
}

type txRewriter struct {
dialect.Tx
}

func (r *txRewriter) Exec(ctx context.Context, query string, args, v interface{}) error {
rp := strings.NewReplacer("`groups`", "`db1`.`groups`", "`pets`", "`db1`.`pets`", "`users`", "`db2`.`users`", "`group_users`", "`db2`.`group_users`")
query = rp.Replace(query)
return r.Tx.Exec(ctx, query, args, v)
}
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