blocks|key|4229826|text|您可以使用options_for_select来实现此目的。它需要一个二维数组。您可以像这样转换您的散列：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4229827|data+=+[{"name"=>"NameA",+"id"=>"001"},+{"name"=>"NameB",+"id"=>"002"}]
data_for_select+=+data.each+{+%7Chash%7C+[hash['name'],+hash['id']]+}
options_for_select(data_for_select)|code-block|syntax|javascript|4229828|作为options_from_collection_for_select的附注，它与对象结合使用。它遍历对象并为标签发送一条消息，为id发送一条消息。|4229829|entityMap^0|5|I|0|0|2|Y|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@]|E|$]]|$1|M|3|-4|5|6|7|V|8|@]|D|@]|E|$]]]|N|$]]

You can use <code>options_for_select</code> for this purpose. It takes a two dimensional Array. You can convert your hash like so:

<pre><code>data = [{"name"=&gt;"NameA", "id"=&gt;"001"}, {"name"=&gt;"NameB", "id"=&gt;"002"}]
data_for_select = data.each { |hash| [hash['name'], hash['id']] }
options_for_select(data_for_select)
</code></pre>

As a side note to <code>options_from_collection_for_select</code>, it is used in combination with objects. It iterates through the objects and sends a message for the label and one for the id.

blocks|key|4229884|text|好吧，我最终找到了一个可行的解决方案，尽管它可能不是最好的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4229885|$+@array_of_hashes+=+[{"name"=>"NameA",+"id"=>"001"},+{"name"=>"NameB",+"id"=>"002"}]
=>+[{"name"=>"NameA",+"id"=>"001"},+{"name"=>"NameB",+"id"=>"002"}]
$+@formatted_array_of_hashes+=+@array_of_hashes.each.map{+%7Ch%7C+{+h["name"]+=>+h["id"]+}}
=>+[{"NameA"+=>+"001"},+{"NameB"+=>+"002"}]
$+@merged_hash+=+Hash[*@formatted_array_of_hashes.map(&:to_a).flatten]
=>+{"NameA"+=>+"001",+"NameB"+=>+"002"}|code-block|syntax|javascript|4229886|然后，我可以创建一个选择字段|4229887|<%25=+select_tag+'model[field]',+options_for_select(@merged_hash)+%25>|4229888|生成正确标记的|4229889|<select>
++<option+value="001">NameA</option>
++<option+value="002">NameB</option>
</select>|4229890|有点复杂，但它是有效的。我欢迎任何改进。|4229891|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|W|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|Y|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

Ok, I eventually figured out a solution that works, though it may not be the best.

<pre><code>$ @array_of_hashes = [{"name"=&gt;"NameA", "id"=&gt;"001"}, {"name"=&gt;"NameB", "id"=&gt;"002"}]
=&gt; [{"name"=&gt;"NameA", "id"=&gt;"001"}, {"name"=&gt;"NameB", "id"=&gt;"002"}]
$ @formatted_array_of_hashes = @array_of_hashes.each.map{ |h| { h["name"] =&gt; h["id"] }}
=&gt; [{"NameA" =&gt; "001"}, {"NameB" =&gt; "002"}]
$ @merged_hash = Hash[*@formatted_array_of_hashes.map(&amp;:to_a).flatten]
=&gt; {"NameA" =&gt; "001", "NameB" =&gt; "002"}
</code></pre>

I was then able to create a select field

<pre><code>&lt;%= select_tag 'model[field]', options_for_select(@merged_hash) %&gt;
</code></pre>

that generates the correct markup

<pre><code>&lt;select&gt;
 &lt;option value="001"&gt;NameA&lt;/option&gt;
 &lt;option value="002"&gt;NameB&lt;/option&gt;
&lt;/select&gt;
</code></pre>

A little convoluted, but its working. I welcome any improvements.

blocks|key|4712615|text|一个更好的方法是只用一个命令：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4712616|<%25=+select_tag+"model[field]",+options_for_select(@array_of_hashes.map+{+%7Cobj%7C+[obj['name'],+obj['id']]+})+%25>|code-block|syntax|javascript|4712617|使用您的示例散列：|4712618|irb>+@array_of_hashes+=+[{"name"=>"NameA",+"id"=>"001"},+{"name"=>"NameB",+"id"=>"002"}]
=>+[{"name"=>"NameA",+"id"=>"001"},+{"name"=>"NameB",+"id"=>"002"}]
irb>+@array_of_hashes.map+{+%7Cobj%7C+[obj['name'],+obj['id']]+}
=>+[["NameA",+"001"],+["NameB",+"002"]]|4712619|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|$]]

A better way to do it in only one command:

<pre><code>&lt;%= select_tag "model[field]", options_for_select(@array_of_hashes.map { |obj| [obj['name'], obj['id']] }) %&gt;
</code></pre>

With your example hash:

<pre><code>irb&gt; @array_of_hashes = [{"name"=&gt;"NameA", "id"=&gt;"001"}, {"name"=&gt;"NameB", "id"=&gt;"002"}]
=&gt; [{"name"=&gt;"NameA", "id"=&gt;"001"}, {"name"=&gt;"NameB", "id"=&gt;"002"}]
irb&gt; @array_of_hashes.map { |obj| [obj['name'], obj['id']] }
=&gt; [["NameA", "001"], ["NameB", "002"]]
</code></pre>

blocks|key|4229955|text|如果你有像这样的散列数组：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4229956|@people+=+[{"name"=>"NameA",+"id"=>"001"},+{"name"=>"NameB",+"id"=>"002"}]|code-block|syntax|javascript|4229957|您可以将options_for_select助手与collect方法一起使用，如下所示：|offset|length|style|CODE|4229958|=+select_tag+"people",+options_for_select(@people.collect+{%7Cp%7C+[+p['name'],+p['id']+]+})|4229959|完成了:-)。|4229960|entityMap|0|LINK|mutability|MUTABLE|url|http://api.rubyonrails.org/classes/ActionView/Helpers/FormOptionsHelper.html#method-i-options_for_select|1|http://www.ruby-doc.org/core-2.1.2/Array.html#method-i-collect^0|0|0|4|I|P|7|4|I|0|P|7|1|0|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|12|8|@$I|13|J|14|K|L]|$I|15|J|16|K|L]]|9|@$I|17|J|18|1|19]|$I|1A|J|1B|1|1C]]|A|$]]|$1|M|3|N|5|D|7|1D|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|1E|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|1F|8|@]|9|@]|A|$]]]|R|$S|$5|T|U|V|A|$W|X]]|Y|$5|T|U|V|A|$W|Z]]]]

If you have array of hashes like this:

<pre><code>@people = [{"name"=&gt;"NameA", "id"=&gt;"001"}, {"name"=&gt;"NameB", "id"=&gt;"002"}]
</code></pre>

You can use <a href="http://api.rubyonrails.org/classes/ActionView/Helpers/FormOptionsHelper.html#method-i-options_for_select" rel="noreferrer"><code>options_for_select</code></a> helper with <a href="http://www.ruby-doc.org/core-2.1.2/Array.html#method-i-collect" rel="noreferrer"><code>collect</code></a> method like this:

<pre><code>= select_tag "people", options_for_select(@people.collect {|p| [ p['name'], p['id'] ] })
</code></pre>

And its done :-).

blocks|key|4229999|text|对我来说，在selects中使用散列的最简单方法是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4230000|散列：|4230001|REVISION_TYPES={"S"=>"Stock",+"T"=>"Traducción"}|code-block|syntax|javascript|4230002|在表单中：|4230003|select_tag(:revision_type,options_for_select(REVISION_TYPES.invert.to_a))|4230004|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

The easiest way to use Hashes in selects, for me is:

The hash:

<pre><code>REVISION_TYPES={"S"=&gt;"Stock", "T"=&gt;"Traducción"}
</code></pre>

In the form:

<pre><code>select_tag(:revision_type,options_for_select(REVISION_TYPES.invert.to_a))
</code></pre>

blocks|key|204837|text|我真的不确定为什么，但没有一个答案对我有效。也许是因为Rails5，所以我自己想出来了，我很高兴和大家分享。它现在很漂亮，但工作得很好。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|204838|这是一个来自外部API+(Pipedrive)的散列数组，我希望将它与用户的表关联起来：|204839|这是我的表格：|204840|<%25=+form.collection_select(:id_user_pipedrive,+Owner.all_id_name,+:id,+:name,+:include_blank+=>+'')+%25>|code-block|syntax|javascript|204841|这是在我的假模型中：|204842|UserPipedrive+=+Struct.new(:id,+:name)
def+self.all_id_name
++all["data"].map+{+%7Cd%7C+UserPipedrive.new(d["id"],d["name"])+}
end|204843|希望这能帮助到别人。|204844|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|U|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|V|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|W|8|@]|9|@]|A|$]]|$1|M|3|N|5|H|7|X|8|@]|9|@]|A|$I|J]]|$1|O|3|P|5|6|7|Y|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

I'm not really sure why, but none of the answers worked for me. maybe because of Rails 5, so I figured it out by myself and I'm happy to share.
It's now pretty but works well.

It's an Array of Hashes from an external API (Pipedrive) that I want to associate with the user's table:

This is in my form:

<pre><code>&lt;%= form.collection_select(:id_user_pipedrive, Owner.all_id_name, :id, :name, :include_blank =&gt; '') %&gt;
</code></pre>

And this is in my fake model:

<pre><code>UserPipedrive = Struct.new(:id, :name)
def self.all_id_name
 all["data"].map { |d| UserPipedrive.new(d["id"],d["name"]) }
end
</code></pre>

Hope it helps someone.

In a Rails 3.2 app I'm trying to add a select field that takes its data from an external API call. This data is returned as an array of hashes:

<pre><code>[{"name"=&gt;"NameA", "id"=&gt;"001"}, {"name"=&gt;"NameB", "id"=&gt;"002"}]
</code></pre>

How can I use this data to construct a select field that looks something like:

<pre><code>&lt;select&gt;
 &lt;option value="001"&gt; NameA &lt;/option&gt;
 &lt;option value="002"&gt; NameB &lt;/option&gt;
&lt;/select&gt;
</code></pre>

EDIT:

Thanks to the suggestions below I've tried the following:

A:

<pre><code>&lt;%= select_tag 'model[field]', options_from_collection_for_select(@hash, :id, :name) %&gt;
</code></pre>

Gives an error:

<pre><code>undefined method `name' for {"name"=&gt;"NameA", "id"=&gt;"001"}:Hash
</code></pre>

B:

<pre><code>&lt;%= select_tag 'model[field]', options_from_collection_for_select(@hash) %&gt;
</code></pre>

Fixes the error but generates the wrong markup

<pre><code>&lt;option value="{"name"=&gt;"NameA", "id"=&gt;"001"}"&gt; {"name"=&gt;"NameA", "id"=&gt;"001"}&lt;/option&gt;
</code></pre>

So I think my problem is formatting the array of hashes correctly, and I don't know enough about manipulating arrays of hashes to work out how to do this.

Unless I'm looking in completly the worng direction, I think the key to this problem is to reformat the array at the top of this question to give: 

<pre><code>{"NameA" =&gt;"001", "NameB" =&gt;"002"}
</code></pre>

Is this even possible? And if so, how?

How to populate a select_tag with an array of hashes?

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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在一个Rails3.2应用程序中，我尝试添加一个select字段，它从外部API调用中获取数据。此数据以散列数组的形式返回：[{"name"=>"NameA", "id"=>"001"}, {"name"=>"NameB", "id"=>"002"}]如何使用这些数据构造如下所示的select字段：<select> ...

问如何使用散列数组填充select_tag？
EN

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问如何使用散列数组填充select_tag？EN