blocks|key|1975831|text|您可以使用:symbol作为第一个参数。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1975832|<%25=+simple_form_for+:user,+url:+users_path+do+%7Cf%7C+%25>
++<%25=+f.input+:name,+as:+:string+%25>
++...
<%25+end+%25>|code-block|syntax|javascript|1975833|它将输出类似如下的内容：|1975834|<form+novalidate="novalidate"+class="simple_form+user"+action="/users"+accept-charset="UTF-8"+method="post">
++...
++<div+class="input+string+required+user_name">
++++<label+class="string+required"+for="user_name">
++++++<abbr+title="required">*</abbr>+Name
++++</label>
++++<input+class="string+required"+type="text"+name="user[name]"+id="user_name"+/>
++</div>
++...
</form>|1975835|entityMap^0|5|7|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|U|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|O|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|P|$]]

<p>You can use <code>:symbol</code> as the first argument.</p>

<pre><code>&lt;%= simple_form_for :user, url: users_path do |f| %&gt;
  &lt;%= f.input :name, as: :string %&gt;
  ...
&lt;% end %&gt;
</code></pre>

<p>It will output something like this:</p>

<pre><code>&lt;form novalidate="novalidate" class="simple_form user" action="/users" accept-charset="UTF-8" method="post"&gt;
  ...
  &lt;div class="input string required user_name"&gt;
    &lt;label class="string required" for="user_name"&gt;
      &lt;abbr title="required"&gt;*&lt;/abbr&gt; Name
    &lt;/label&gt;
    &lt;input class="string required" type="text" name="user[name]" id="user_name" /&gt;
  &lt;/div&gt;
  ...
&lt;/form&gt;
</code></pre>


blocks|key|4912077|text|您还可以传递:symbol而不是@object作为simple_form_for的参数。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4912078|<%25=+simple_form_for+:email,+:url+=>+'/post_email'+do+%7Cf%7C+%25>
++<%25=+f.input+:subject,+:as+=>+:string+%25>
<%25+end+%25>|code-block|syntax|javascript|4912079|这将输出：|4912080|<form+method="post"+class="simple_form+email"+action="/post_email"+accept-charset="UTF-8">
++...
++<input+type="text"+size="30"+name="email[subject]"+id="email_subject">
</form>|4912081|请注意以下回调：|4912082|您将无法利用自动模型validation|4912083|Need来显式定义每个input|unordered-list-item|4912084|
的类型和|4912085|4912086|4912087|entityMap^0|6|7|G|7|P|F|0|0|0|0|0|0|B|5|0|0|0|0^^$0|@$1|2|3|4|5|6|7|11|8|@$9|12|A|13|B|C]|$9|14|A|15|B|C]|$9|16|A|17|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|18|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|19|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|1A|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|1B|8|@]|D|@]|E|$]]|$1|Q|3|R|5|6|7|1C|8|@]|D|@]|E|$]]|$1|S|3|T|5|U|7|1D|8|@$9|1E|A|1F|B|C]]|D|@]|E|$]]|$1|V|3|W|5|6|7|1G|8|@]|D|@]|E|$]]|$1|X|3|-4|5|U|7|1H|8|@]|D|@]|E|$]]|$1|Y|3|-4|5|6|7|1I|8|@]|D|@]|E|$]]|$1|Z|3|-4|5|6|7|1J|8|@]|D|@]|E|$]]]|10|$]]

<p>You could also pass a <code>:symbol</code> instead of <code>@object</code> as argument for <code>simple_form_for</code>.</p>

<pre><code>&lt;%= simple_form_for :email, :url =&gt; '/post_email' do |f| %&gt;
  &lt;%= f.input :subject, :as =&gt; :string %&gt;
&lt;% end %&gt;
</code></pre>

<p>Which would output:</p>

<pre><code>&lt;form method="post" class="simple_form email" action="/post_email" accept-charset="UTF-8"&gt;
  ...
  &lt;input type="text" size="30" name="email[subject]" id="email_subject"&gt;
&lt;/form&gt;
</code></pre>

<p>Please be aware of following draw-backs:</p>

<ul>
<li>You won't be able to take advantage of automatic model validation</li>
<li>Need to explicitly define <code>:url</code> and the type of each <code>input</code></li>
</ul>


blocks|key|3311859|text|不幸的是，simple_form依赖于使用模型。从本质上讲，如果有类似于simple_form_tag和input_tag方法的东西与它们的rails+*_tag帮助器等同，那就更好了。在此之前，有一个简单的解决办法。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3311860|在表单中使用符号而不是类，并显式传递该值以防止simple_form尝试访问模型属性。|3311861|<%25=+simple_form_for+:user,+:url+=>+'/users'+do+%7Cf%7C+%25>
++<%25=+f.text_field+:name,+input_html:+{+value:+nil+}+%25>
<%25+end+%25>|code-block|syntax|javascript|3311862|这将避免undefined+method+'name'+for+User错误。|offset|length|style|CODE|3311863|entityMap^0|0|0|0|4|W|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|T|8|@$K|U|L|V|M|N]]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

<p>Unfortunately simple_form relies on using a model. Essentially it would be nice to have something like simple_form_tag and input_tag methods equivalent to their rails *_tag helpers. Until then, there's an easy work around. </p>

<p>Use a symbol instead of the class in the form and pass the value explicitly to prevent simple_form from trying to access the model properties. </p>

<pre><code>&lt;%= simple_form_for :user, :url =&gt; '/users' do |f| %&gt;
  &lt;%= f.text_field :name, input_html: { value: nil } %&gt;
&lt;% end %&gt;
</code></pre>

<p>This will avoid the <code>undefined method 'name' for User</code> error.</p>


blocks|key|4912156|text|上面的所有方法仍然会给您留下嵌套在"user“或您作为第一个参数传递的任何符号中的表单数据。这太烦人了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4912157|要模仿simple_form的样式/优点，但要移除对象/符号依赖和强制数据嵌套，您可以创建一个部分。|4912158|HAML示例：|offset|length|style|CODE|4912159|表单视图：|4912160|=+form_tag("path/to/action",+method:+"POST")+do
++++=+render+"path/to/partial/field",+type:+"string",+required:+true,+item:+"first_name"|code-block|syntax|javascript|4912161|field部分：|4912162|-+required_string+=+required+?+"required"+:+""
%25div{class:+"input+#{type}+#{required_string}+#{item}"}
++%25label{class:+"#{type}+#{required_string}",+for:+"#{item}"}
++++-+if+required
++++++%25abbr{title:+"required"}
++++++++*
++++=+t("application.#{item}")
++%25input{name:+"#{item}",+++++++++++++++++++++++++++++++++++++++++++++++++++++%7C
++++placeholder:+t("application.#{item}"),++++++++++++++++++++++++++++++++++++%7C
++++type:+"#{type}",++++++++++++++++++++++++++++++++++++++++++++++++++++++++++%7C
++++required:+required,+++++++++++++++++++++++++++++++++++++++++++++++++++++++%7C
++++"aria-required"+=>+"#{required}"+}|4912163|entityMap^0|0|0|0|4|0|0|0|0|5|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|Y|8|@$F|Z|G|10|H|I]]|9|@]|A|$]]|$1|J|3|K|5|6|7|11|8|@]|9|@]|A|$]]|$1|L|3|M|5|N|7|12|8|@]|9|@]|A|$O|P]]|$1|Q|3|R|5|6|7|13|8|@$F|14|G|15|H|I]]|9|@]|A|$]]|$1|S|3|T|5|N|7|16|8|@]|9|@]|A|$O|P]]|$1|U|3|-4|5|6|7|17|8|@]|9|@]|A|$]]]|V|$]]

<p>All of the methods above still leave you with form data nested inside of "user" or whatever symbol that you pass as the first argument.  That's annoying.</p>

<p>To mimic simple_form's style/benefits, but remove the object/symbol dependency and the forced data nesting, you can create a partial.</p>

<p><code>HAML</code> examples:</p>

<p>form view:</p>

<pre><code>= form_tag("path/to/action", method: "POST") do
    = render "path/to/partial/field", type: "string", required: true, item: "first_name"
</code></pre>

<p><code>field</code> partial:</p>

<pre><code>- required_string = required ? "required" : ""
%div{class: "input #{type} #{required_string} #{item}"}
  %label{class: "#{type} #{required_string}", for: "#{item}"}
    - if required
      %abbr{title: "required"}
        *
    = t("application.#{item}")
  %input{name: "#{item}",                                                     |
    placeholder: t("application.#{item}"),                                    |
    type: "#{type}",                                                          |
    required: required,                                                       |
    "aria-required" =&gt; "#{required}" }
</code></pre>


blocks|key|3311918|text|您还可以在表单模型中使用模型外部的字段，simple_fields_for如下所示：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3311919|<%25=+simple_form_for+@user+do+%7Cf%7C+%25>
++<%25=+f.input+:name+%25>

++<%25=+simple_fields_for+:no_model_fields+do+%7Cn%7C+%25>
++++<%25=+n.input+:other_field+%25>
++<%25+end+%25>
<%25+end+%25>|code-block|syntax|javascript|3311920|这是一个简单而实用的解决方案，因为您可以从不同的模型创建不同类型的字段，也可以不使用模型|3311921|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>You can also use fields outside the model within a form model, with simple_fields_for like this:</p>

<pre><code>&lt;%= simple_form_for @user do |f| %&gt;
  &lt;%= f.input :name %&gt;

  &lt;%= simple_fields_for :no_model_fields do |n| %&gt;
    &lt;%= n.input :other_field %&gt;
  &lt;% end %&gt;
&lt;% end %&gt;
</code></pre>

<p>This is simple and practical solution, because you can create different kind of fields from different models or without  using models</p>


<p>Is it possible to use Simple Form (by: Plataformatec) without a model?</p>

<p><a href="https://github.com/plataformatec/simple_form" rel="noreferrer">https://github.com/plataformatec/simple_form</a></p>


SimpleForm without for (non model form)

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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可以在没有模型的情况下使用Simple Form (by: Plataformatec)吗？

问不带for的SimpleForm (非模型表单)
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