Golang中如何为嵌套结构体编写getter和setter方法

Golang中如何为嵌套结构体编写getter和setter方法 我正在尝试为结构体编写获取和设置值的方法。

这是我正在编写getter和setter的结构体

type Deployments struct {
	Namespace         string            `json:"namespace"`
	Replicas          int               `json:"replicas"`
	Image             string            `json:"images"`
	LivenessProbe     LivenessProbes    `json:"livenessprobe"`
	Port              []DeploymentPorts `json:"port"`
	ReadinessProbe    ReadinessProbes   `json:"readinessprobe"`
	Limit             Limits            `json:"limit"`
	Request           Requests          `json:"request"`
	VolumeMount       []VolumeMounts    `json:"volumemount"`
	NodeSelectorKey   string            `json:"nodeselectorkey"`
	NodeSelectorValue string            `json:"nodeselectorvalue"`
}

这是我的setter函数

//SetDeployment func
func (d *Deployments) SetDeployment(Namespace string, Replicas int, Image string, LivenessProbe LivenessProbes, port DeploymentPorts, ReadinessProbe ReadinessProbes, Limit Limits, Request Requests, VolumeMount VolumeMounts, NodeSelectorKey string, NodeSelectorValue string) {

	d.Namespace = Namespace
	d.Replicas = Replicas
	d.Image = Image
	d.LivenessProbe = LivenessProbe
	d.Port = append(d.Port, port)
	d.ReadinessProbe = ReadinessProbe
	d.Limit = Limit
	d.Request = Request
	d.VolumeMount = append(d.VolumeMount, VolumeMount)
	d.NodeSelectorKey = NodeSelectorKey
	d.NodeSelectorValue = NodeSelectorValue
}

但是当我调用setter添加值时

deployment := models.NewDeployment()

value := deployment.SetDeployment("verizon", 3, "image", models.LivenessProbes{LivenessFailureThreshold: 3, HTTPGetPath: "path", HTTPGetPort: 80, HTTPGetScheme: "http", LivenessInitialDelay: 12, LivenessPeriodSeconds: 10, LivenessSuccessThreshold: 2, LivenessTimeout: 12}, models.DeploymentPorts{ContainerPort: 80, Protocol: "TCP"}, models.ReadinessProbes{HTTPGetPath: "path", HTTPGetPort: 80, HTTPGetScheme: "http", ReadinessFailureThreshold: 10, ReadinessInitialDelay: 10, ReadinessPeriodSeconds: 10, ReadinessSuccessThreshold: 10, ReadinessTimeout: 10}, models.Limits{LimitCPU: "4gb", LimitMemory: "8gb"}, models.Requests{RequestCPU: "4gb", RequestMemory: "8gb"}, models.VolumeMounts{MountName: "name", MountPath: "/"}, "work", "nfs")

我收到一个错误提示被用作值

Screenshot%20from%202019-08-22%2011-53-27


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2 回复

该方法会改变其接收器并产生副作用，且不返回任何内容。您无法对其进行赋值。

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在Go语言中，setter方法通常不返回值，而你的代码尝试将SetDeployment方法的返回值赋给变量value，这导致了"被用作值"的错误。setter方法应该设计为不返回任何值，或者如果需要返回状态或错误，可以返回一个错误类型。

以下是修正后的setter方法示例，移除了返回值：

// SetDeployment 方法设置Deployments结构体的字段
func (d *Deployments) SetDeployment(Namespace string, Replicas int, Image string, LivenessProbe LivenessProbes, port DeploymentPorts, ReadinessProbe ReadinessProbes, Limit Limits, Request Requests, VolumeMount VolumeMounts, NodeSelectorKey string, NodeSelectorValue string) {
    d.Namespace = Namespace
    d.Replicas = Replicas
    d.Image = Image
    d.LivenessProbe = LivenessProbe
    d.Port = append(d.Port, port)
    d.ReadinessProbe = ReadinessProbe
    d.Limit = Limit
    d.Request = Request
    d.VolumeMount = append(d.VolumeMount, VolumeMount)
    d.NodeSelectorKey = NodeSelectorKey
    d.NodeSelectorValue = NodeSelectorValue
}

调用setter时，直接使用方法而不赋值：

deployment := models.NewDeployment()
deployment.SetDeployment("verizon", 3, "image", models.LivenessProbes{LivenessFailureThreshold: 3, HTTPGetPath: "path", HTTPGetPort: 80, HTTPGetScheme: "http", LivenessInitialDelay: 12, LivenessPeriodSeconds: 10, LivenessSuccessThreshold: 2, LivenessTimeout: 12}, models.DeploymentPorts{ContainerPort: 80, Protocol: "TCP"}, models.ReadinessProbes{HTTPGetPath: "path", HTTPGetPort: 80, HTTPGetScheme: "http", ReadinessFailureThreshold: 10, ReadinessInitialDelay: 10, ReadinessPeriodSeconds: 10, ReadinessSuccessThreshold: 10, ReadinessTimeout: 10}, models.Limits{LimitCPU: "4gb", LimitMemory: "8gb"}, models.Requests{RequestCPU: "4gb", RequestMemory: "8gb"}, models.VolumeMounts{MountName: "name", MountPath: "/"}, "work", "nfs")

对于getter方法，通常返回字段的值。例如，为Namespace字段编写getter：

// GetNamespace 方法返回Deployments结构体的Namespace字段
func (d *Deployments) GetNamespace() string {
    return d.Namespace
}

调用getter时，可以赋值给变量：

namespace := deployment.GetNamespace()

如果你的setter需要处理错误（例如验证输入），可以修改为返回错误：

// SetDeployment 方法设置Deployments结构体的字段，并返回错误
func (d *Deployments) SetDeployment(Namespace string, Replicas int, Image string, LivenessProbe LivenessProbes, port DeploymentPorts, ReadinessProbe ReadinessProbes, Limit Limits, Request Requests, VolumeMount VolumeMounts, NodeSelectorKey string, NodeSelectorValue string) error {
    // 添加验证逻辑，例如检查Replicas是否为正数
    if Replicas < 0 {
        return errors.New("replicas must be non-negative")
    }
    d.Namespace = Namespace
    d.Replicas = Replicas
    d.Image = Image
    d.LivenessProbe = LivenessProbe
    d.Port = append(d.Port, port)
    d.ReadinessProbe = ReadinessProbe
    d.Limit = Limit
    d.Request = Request
    d.VolumeMount = append(d.VolumeMount, VolumeMount)
    d.NodeSelectorKey = NodeSelectorKey
    d.NodeSelectorValue = NodeSelectorValue
    return nil
}

调用时处理错误：

err := deployment.SetDeployment("verizon", 3, "image", models.LivenessProbes{LivenessFailureThreshold: 3, HTTPGetPath: "path", HTTPGetPort: 80, HTTPGetScheme: "http", LivenessInitialDelay: 12, LivenessPeriodSeconds: 10, LivenessSuccessThreshold: 2, LivenessTimeout: 12}, models.DeploymentPorts{ContainerPort: 80, Protocol: "TCP"}, models.ReadinessProbes{HTTPGetPath: "path", HTTPGetPort: 80, HTTPGetScheme: "http", ReadinessFailureThreshold: 10, ReadinessInitialDelay: 10, ReadinessPeriodSeconds: 10, ReadinessSuccessThreshold: 10, ReadinessTimeout: 10}, models.Limits{LimitCPU: "4gb", LimitMemory: "8gb"}, models.Requests{RequestCPU: "4gb", RequestMemory: "8gb"}, models.VolumeMounts{MountName: "name", MountPath: "/"}, "work", "nfs")
if err != nil {
    // 处理错误
    log.Fatal(err)
}

确保在调用setter方法时，根据方法签名正确处理返回值。

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