Golang测试容器，无法使网络正常工作

我正在try 在我的微服务中创建一些测试，我想创建一个网络，将我的数据库测试容器(Postgres)和我的微服务测试容器附加到该网络上.无论我怎么try ，我都无法让我的微服务连接到数据库.我的微服务是使用光纤和GORM的Golang.我try 在如下所示的db.go配置文件中连接到数据库:

func SetupDB(port string, host string) *gorm.DB {

    dsn := "host=" + host + " user=postgres password=password dbname=prescription port=" + port + " sslmode=disable"

    db, err := gorm.Open(postgres.Open(dsn), &gorm.Config{})

    if err != nil {
        panic("error connecting to database")
    }

    db.AutoMigrate(&model.Prescription{})

    return db
}

下面是我的测试容器的外观:

    prescriptionDBContainer, err := testcontainers.GenericContainer(context.Background(), testcontainers.GenericContainerRequest{
        ContainerRequest: testcontainers.ContainerRequest{
            Image:        "postgres",
            ExposedPorts: []string{postgresPort.Port()},
            Env: map[string]string{
                "POSTGRES_USER":     "postgres",
                "POSTGRES_PASSWORD": "password",
                "POSTGRES_DB":       "prescription",
            },
            Networks: []string{network.Name},
            NetworkAliases: map[string][]string{
                network.Name: {"db-network"},
            },
            WaitingFor: wait.ForAll(
                wait.ForLog("database system is ready to accept connections"),
                wait.ForListeningPort(postgresPort),
            ),
        },
        Started: true,
    })

prescriptionContainer, err := testcontainers.GenericContainer(context.Background(), testcontainers.GenericContainerRequest{
        ContainerRequest: testcontainers.ContainerRequest{
            FromDockerfile: testcontainers.FromDockerfile{Context: "../../../../prescription"},
            Networks:       []string{network.Name},
            NetworkAliases: map[string][]string{
                network.Name: {"db-network"},
            },
            Env: map[string]string{
                "POSTGRES_USER":     "postgres",
                "POSTGRES_PASSWORD": "password",
                "POSTGRES_DB":       "prescription",
                "HOST":              prescriptionDBHost,
                "DB_PORT":           prescriptionDBPort.Port(),
            },
            ExposedPorts: []string{pMicroPort.Port()},
            WaitingFor:   wait.ForListeningPort("8080"),
        },
        Started: true,
    })

也许这是因为我不能从根本上理解在docker中联网时发生的一些事情，但我真的很困惑，当我为host和DB_Port设置环境时(我已经try 了所有的组合)，它拒绝将微服务连接到数据库

在我的微服务的测试容器中，我try 了:

"HOST":              prescriptionDBHost,
"DB_PORT":           prescriptionDBPort.Port(),

RepuptionDBhost通过以下方式提取:

prescriptionDBHost, err := prescriptionDBContainer.Name(context.Background())

这会导致错误消息:

failed to initialize database, got error failed to connect to `host=/stoic_heyrovsky user=postgres database=prescription`: dial error (dial unix /stoic_heyrovsky/.s.PGSQL.53802: connect: no such file or directory)
panic: error connecting to database

然后，我try 从主机名中删除"/"，如下所示:

"HOST":              strings.Trim(prescriptionDBHost,"/"),
"DB_PORT":           prescriptionDBPort.Port(),

我也试过了:

"HOST":              "localhost",
"DB_PORT":           prescriptionDBPort.Port(),

"HOST":              "127.0.0.1",
"DB_PORT":           prescriptionDBPort.Port(),

prescriptionDBHost, err := prescriptionDBContainer.ContainerIP(context.Background())

"HOST":              prescriptionDBHost,
"DB_PORT":           prescriptionDBPort.Port(),

这里的最后4个示例都导致了某种类型的拨号TCP错误，例如:

failed to initialize database, got error failed to connect to `host=localhost user=postgres database=prescription`: dial error (dial tcp [::1]:53921: connect: cannot assign requested address)

在测试容器创建数据库容器之后，我还进行了调试并停止，然后转到我的微服务，并使用DB_HOST=LOCALHOST和PORT=硬编码连接到该容器，这是成功的，所以我真的不知道出了什么问题.我能想到的唯一一件事是微服务容器在try 连接到数据库之前没有连接到网络.我做了一个对接网络判断，我可以看到数据库容器已附加，但微服务从未附加(但可能只是因为其他原因？).