英文:
Why is my struct method always returning false?
问题
我正在尝试在一个返回布尔值的方法中对我的表单结构进行验证，但是即使应该返回true，我仍然得到false。
如果你看一下Validate方法的最后部分，你会看到我写了validated := len(this.Errors) == 0，根据Errors映射是否有项目，"validated"应该是true或false，然后我返回validated。
当我准确填写表单时，不应该有错误，但是我仍然得到false，而不是true。
有人能解释一下吗？Go不是这样工作的吗？
form.go:
package modelsimport ("../config""../util")type Form struct {Name stringEmail stringPhone stringMessage stringThanks stringErrorHandler}func (this *Form) Validate() bool {this.Errors = make(map[string]string)matched := util.MatchRegexp(".+@.+\\..+", this.Email)if !util.IsEmpty(this.Email) {if matched == false {this.Errors["Email"] = config.EMAIL_INVALID}} else {this.Errors["Email"] = config.EMAIL_EMPTY}if util.IsEmpty(this.Name) {this.Errors["Name"] = config.NAME_EMPTY}if util.IsEmpty(this.Phone) {this.Errors["Phone"] = config.PHONE_EMPTY}if util.IsEmpty(this.Message) {this.Errors["Message"] = config.MESSAGE_EMPTY}validated := len(this.Errors) == 0if validated {this.Thanks = config.THANK_YOU}return validated}
errorhandler.go:
package modelstype ErrorHandler struct {Errors map[string]string}func (this *ErrorHandler) HandleErr(err string) {this.Errors = make(map[string]string)this.Errors["Error"] = err}
这是我尝试调用Validate方法的地方 - 在我的控制器中的一个函数中：
form := &models.Form{Name: r.FormValue("name"),Email: r.FormValue("email"),Phone: r.FormValue("phone"),Message: r.FormValue("message")}if form.Validate() {// 这里永远不会运行，因为'form.Validate()'总是false}
我不认为util.IsEmpty()是问题所在...它只是检查字符串是否为空：
func IsEmpty(str string) bool {return strings.TrimSpace(str) == ""}
任何帮助将不胜感激！
英文:
I'm trying to do validation on my form struct in a method that returns a bool, but I keep getting false even when it should be returning true..
If you look towards the end of the Validate method, you'll see I write validated := len(this.Errors) == 0 which should be making "validated" either true or false based on whether the Errors map has items or not, and then I return validated.
When I fill out my form accurately, there should be no errors yet I still get false when I should be getting true.
Can someone explain? Is this not how Go works?
form.go:
package modelsimport ("../config""../util")type Form struct {Name stringEmail stringPhone stringMessage stringThanks stringErrorHandler}func (this *Form) Validate() bool {this.Errors = make(map[string]string)matched := util.MatchRegexp(".+@.+\\..+", this.Email)if !util.IsEmpty(this.Email) {if matched == false {this.Errors["Email"] = config.EMAIL_INVALID}} else {this.Errors["Email"] = config.EMAIL_EMPTY}if util.IsEmpty(this.Name) {this.Errors["Name"] = config.NAME_EMPTY}if util.IsEmpty(this.Phone) {this.Errors["Phone"] = config.PHONE_EMPTY}if util.IsEmpty(this.Message) {this.Errors["Message"] = config.MESSAGE_EMPTY}validated := len(this.Errors) == 0if validated {this.Thanks = config.THANK_YOU}return validated}
errorhandler.go:
package modelstype ErrorHandler struct {Errors map[string]string}func (this *ErrorHandler) HandleErr(err string) {this.Errors = make(map[string]string)this.Errors["Error"] = err}
And this is where I try to call the Validate method -- in a function in my controller:
form := &models.Form{Name: r.FormValue("name"),Email: r.FormValue("email"),Phone: r.FormValue("phone"),Message: r.FormValue("message")}if form.Validate() {// This never runs because 'form.Validate()' is always false}
I don't think the util.IsEmpty() is the culprit here.. just checks if the string is empty:
func IsEmpty(str string) bool {return strings.TrimSpace(str) == ""}
Any help would be appreciated!
答案1
得分: 1
最好使用类似以下的日志语句来调试这种问题：
log.Printf("form: %v", form)
在调用validate之前，这样可以清楚地了解输入数据的样式。
问候，Philip
英文:
It's best to debug this kind of problem with a log statement like:
log.Printf("form: %v", form)
before calling validate, so it's clear what the input data looks like.
Greetings, Philip
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