blocks|key|1739603|text|该方法不存在。我通常使用{%25+if+form.points.vars.errors%7Clength+%25}。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1739604|entityMap^0|C|13|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

<p>That method does not exist. I typically do <code>{% if form.points.vars.errors|length %}</code>.</p>


blocks|key|1953129|text|我发现的更好的方法是使用这种代码|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1953130|{%25+if+not+form.vars.valid+%25}
<div+class="alert+alert-error">
++++{{+form_errors(form)+}}
</div>
{%25+endif+%25}|code-block|syntax|javascript|1953131|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

<p>better way I found, is to use this kind of code</p>

<pre><code>{% if not form.vars.valid %}
&lt;div class="alert alert-error"&gt;
    {{ form_errors(form) }}
&lt;/div&gt;
{% endif %}
</code></pre>


blocks|key|1953122|text|您还可以在覆盖字段呈现时检查错误：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1953123|{%25+block+field_row+%25}
{%25+spaceless+%25}++++
++++<div+class="control-group+{%25+if+errors+%25}error{%25+endif+%25}">
++++++{{+form_label(form)+}}
++++++<div+class="controls">
++++++++{{+form_widget(form)+}}++++++++
++++++++{{+form_errors(form)+}}++++++++
++++++</div>
++++</div>++++
{%25+endspaceless+%25}
{%25+endblock+field_row+%25}|code-block|syntax|javascript|1953124|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

<p>You can also check for errors when overriding field rendering:
</p>

<pre><code>{% block field_row %}
{% spaceless %}    
    &lt;div class="control-group {% if errors %}error{% endif %}"&gt;
      {{ form_label(form) }}
      &lt;div class="controls"&gt;
        {{ form_widget(form) }}        
        {{ form_errors(form) }}        
      &lt;/div&gt;
    &lt;/div&gt;    
{% endspaceless %}
{% endblock field_row %}
</code></pre>


blocks|key|1953210|text|对于更深层次的表单定制，我会这样做：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1953211|<div+class="form-group+{%25+if+form.MYFORMINPUT.vars.valid==false+%25}has-error{%25+endif+%25}">
//some+twisted+divs
{{form_label(form.MYFORMINPUT)}}
{{form_widget(form.MYFORMINPUT)}}
</div>|code-block|syntax|javascript|1953212|Sf2.5|1953213|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

<p>For deeper form customization I do:</p>

<pre><code>&lt;div class="form-group {% if form.MYFORMINPUT.vars.valid==false %}has-error{% endif %}"&gt;
//some twisted divs
{{form_label(form.MYFORMINPUT)}}
{{form_widget(form.MYFORMINPUT)}}
&lt;/div&gt;
</code></pre>

<p>Sf2.5</p>


blocks|key|1953232|text|如果您使用的是symfony+4，则可以使用以下代码检查是否存在错误|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1953233|{%25+if+form_errors(registrationForm)+%25}
++++<div+class="alert+alert-danger">++++++++
++++++++{{+form_errors(registrationForm)+}}
++++</div>
{%25+endif+%25}|code-block|syntax|javascript|1953234|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

<p>If you are using symfony 4, you can check errors existence with this code</p>

<pre><code>{% if form_errors(registrationForm) %}
    &lt;div class="alert alert-danger"&gt;        
        {{ form_errors(registrationForm) }}
    &lt;/div&gt;
{% endif %}
</code></pre>


blocks|key|1953243|text|检查表单是否有错误的最简单方法是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1953244|{%25+if+not+form.vars.errors%7Clength+%25}

{%25+endif+%25}|code-block|syntax|javascript|1953245|Symfony版本>=+4|1953246|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

<p>The simplest way of checking whether the form has an error:</p>
<pre><code>{% if not form.vars.errors|length %}

{% endif %}
</code></pre>
<p>Symfony version &gt;= 4</p>


blocks|key|1739649|text|由于空数组解析为false，因此可以将现有检查缩短为|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1739650|{%25+if+form.WIDGET_NAME.get('errors')+%25}|code-block|syntax|javascript|1739651|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

<p>Since an empty array resolves to false, you can shorten your existing check to</p>

<pre><code>{% if form.WIDGET_NAME.get('errors') %}
</code></pre>


blocks|key|1953221|text|这是我使用的：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1953222|+<div+class="form-group+{{+form.brand.vars.errors%7Clength+>+''+?+'has-error'+}}">|code-block|syntax|javascript|1953223|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

<p>This is what i use :</p>

<pre><code> &lt;div class="form-group {{ form.brand.vars.errors|length &gt; '' ? 'has-error' }}"&gt;
</code></pre>


blocks|key|1953108|text|我也遇到过类似的问题，但是我的细枝模板中不存在form.points。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1953109|我必须获取控制器中的错误数，然后将其作为变量传递到我的模板中。不过，在控制器中，$form->getErrors()的行为并不像您所期望的那样。有关正确获取表单错误的函数，请参见this+SO+question。|1953110|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/6978723/symfony2-how-to-get-form-validation-errors-after-binding-the-request-to-the-fo^0|N|B|0|14|I|2H|G|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@$9|Q|A|R|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@$9|V|A|W|1|X]]|E|$]]|$1|H|3|-4|5|6|7|Y|8|@]|D|@]|E|$]]]|I|$J|$5|K|L|M|E|$N|O]]]]

<p>I had a similar problem, but <code>form.points</code> doesn't exist in my twig templates.</p>

<p>I had to get the number of errors in the controller, then pass it into my templates as a variable. <code>$form-&gt;getErrors()</code> does not behave as you might expect in your controller though. See <a href="https://stackoverflow.com/questions/6978723/symfony2-how-to-get-form-validation-errors-after-binding-the-request-to-the-fo">this SO question</a> for a function that will get the form errors correctly.</p>


blocks|key|1739681|text|我创建了一个twig扩展来处理这个问题:我的扩展|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1739682|public+function+hasError($string)
{
++++if(strlen($string)+>+4)
++++++++return+true;
++++return+false;
}|code-block|syntax|javascript|1739683|我在twig中是这样使用它的|1739684|{{+has_error(form_errors(form.username))+?+form_errors(form.username)+:+''+}}|1739685|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

<p>i have create a twig extension to handle this:
my extension </p>

<pre><code>public function hasError($string)
{
    if(strlen($string) &gt; 4)
        return true;
    return false;
}
</code></pre>

<p>i use it like this in twig</p>

<pre><code>{{ has_error(form_errors(form.username)) ? form_errors(form.username) : '' }}
</code></pre>


<p>In Twig template I check if a field has an error like this:</p>

<pre><code>{% if form.points.get('errors') is not empty %}
</code></pre>

<p>Is there any method like:</p>

<pre><code>{% if form.points.hasErrors() %}
</code></pre>

<p>to do it simpler? It's not a big difference, but if I can't do it easier why not.</p>


Simple check if form field has errors in Twig template

在Twig模板中，我检查一个字段是否有如下错误：{% if form.points.get('errors') is not empty %}有没有像这样的方法：{% if form.points.hasErrors() %}做得更简单？这不是很大的区别，但如果我不能做得更容易，为什么不呢？

问简单检查表单字段在Twig模板中是否有错误
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