AssertAssociationCount(t, users, "Company", 3, "")
	AssertAssociationCount(t, users, "Manager", 2, "")

	// Find
	var companies []Company
	if DB.Model(&users).Association("Company").Find(&companies); len(companies) != 3 {
		t.Errorf("companies count should be %v, but got %v", 3, len(companies))
	}

	var managers []User
	if DB.Model(&users).Association("Manager").Find(&managers); len(managers) != 2 {

		return
	}

	companies := []Company{
		{Name: "delete-returning-1"},
		{Name: "delete-returning-2"},
		{Name: "delete-returning-3"},
	}
	DB.Create(&companies)

	var results []Company
	DB.Where("name IN ?", []string{companies[0].Name, companies[1].Name}).Clauses(clause.Returning{}).Delete(&results)
	if len(results) != 2 {

	}

	companies := []Company{
		{ID: 101, Name: "company101_with_primarykey"},
		{ID: 102, Name: "company102_with_primarykey"},
	}
	DB.Create(&companies)

	if companies[0].ID != 101 || companies[1].ID != 102 {
		t.Errorf("invalid primary key after creating, got %v, %v", companies[0].ID, companies[1].ID)
	}
}

func TestCreateFromSubQuery(t *testing.T) {

		t.Fatalf("Build count with select, but got %v", result.Statement.SQL.String())
	}

	var count4 int64
	if err := DB.Table("users").Joins("LEFT JOIN companies on companies.name = users.name").Where("users.name = ?", user1.Name).Count(&count4).Error; err != nil || count4 != 1 {
		t.Errorf("count with join, got error: %v, count %v", err, count4)
	}

	var count5 int64

			Joins: []clause.Join{
				{
					Table: clause.Table{Name: "companies", Raw: false},
					ON: clause.Where{
						Exprs: []clause.Expression{
							clause.Eq{
								Column: clause.Column{
									Table: "users",
									Name:  "company_id",
								},
								Value: clause.Column{
									Table: "companies",
									Name:  "id",
								},
							},
						},
					},
				},

and utilities for concurrency, I/O, hashing, primitives, strings, and more! It
is widely used on most Java projects within Google, and widely used by many
other companies as well.



Guava comes in two flavors:

*   The JRE flavor requires JDK 1.8 or higher.
*   If you need support for Android, use
    [the Android flavor](https://github.com/google/guava/wiki/Android). You can

        able to discuss the full details of what you're working on.


        But Guava aims to provide functionality that is useful across boundaries of projects,
        companies, or even industries — utilities useful for a sizable proportion of all Java
        programmers everywhere. If you can give enough detail such that any of us can imagine coming

        able to discuss the full details of what you're working on.


        But Guava aims to provide features that are useful across boundaries of projects, companies,
        or even industries — utilities useful for a sizable proportion of all Java programmers
        everywhere. If you can give enough detail such that any of us can imagine coming across

	}
}

type CompanyNew struct {
	ID   int
	Name int
}

func TestAlterColumnDataType(t *testing.T) {
	DB.AutoMigrate(Company{})

	if err := DB.Table("companies").Migrator().AlterColumn(CompanyNew{}, "name"); err != nil {
		t.Fatalf("failed to alter column from string to int, got error %v", err)
	}

	DB.AutoMigrate(Company{})

* <a href="https://developers.liblab.com/tutorials/sdk-for-fastapi/?utm_source=fastapi" class="external-link" target="_blank">liblab</a>

There are also several other companies offering similar services that you can search and find online. 🤓

## Generate a TypeScript Frontend Client

Let's start with a simple FastAPI application:

//// tab | Python 3.9+