knockout.js - KnockoutJS 实时验证本地化

Question

我正在尝试本地化 KnockoutJS 验证插件，但我需要能够即时在语言之间切换。有一个 issue open on the plugin但它已经超过 2 年了(并且仍然开放)。

我只是想做的是在加载所有内容后切换验证消息的语言。这是一个例子(可以在 fiddle 上看到: http://jsfiddle.net/Kikketer/S6j2q/ )

<input data-bind='value: phone' />
<div data-bind="text: phone"></div>
<button type='button' data-bind="click: v">Validate</button>
<button type='button' data-bind='click: switchLanguage'>Switch Language</button>

使用以下 JS:

ko.validation.configure({
    registerExtenders: true
});
// If I localize right away, things work
ko.validation.localize({required: '**Required'});

var InterviewTwo = function() {
    // Standard "required" validator
    this.phone = ko.observable().extend({required: true});

    // Group all of the validators
    this.errors = ko.validation.group(this);

    // Validation function
    this.v = function() {
        this.errors.showAllMessages();
    };

    // Switching languages after or before the validation
    this.switchLanguage = function() {
        // If I localize later, nothing is changed.
        ko.validation.localize({required: 'eh... sorta?'});
        ko.validation.registerExtenders();
    };
};

ko.applyBindings(new InterviewTwo());

我注意到在 knockout 代码中，错误的 getter 方法总是返回第一个本地化错误字符串。如何“重新初始化”错误字符串？

从 KnockoutJS 第 736 行:

var errorMsgAccessor = function () {
    if (!config.messagesOnModified || isModified) {
        return isValid ? null : obsv.error; <<<< obsv.error is always the first error message
    } else {
        return null;
    }
};

Answer 1

您的代码会更新本地化，但新消息仅适用于下一次更新。

用这个替换 switchLanguage:

this.switchLanguage = function() {
    // If I localize later, nothing is changed.
    ko.validation.localize({required: 'eh... sorta?'});
    for (var prop in this)
        if (ko.isObservable(this[prop]) && typeof(this[prop].valueHasMutated) === 'function')
            this[prop].valueHasMutated();        
};

Fiddle