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[英]Is it possible to generate a simple_form field out of a JSON response?
[英]Ruby on Rails, simple_form - I want to set a hidden field of the simple_form from a html select_tag field
我不確定這是否應該在 Java 腳本或 HTML 部分中完成。 我希望在 HTML 部分使用這樣的東西:
<%= f.hidden_field :skip_option, :value => "the_value_from_the_select_tag" %>
Java Script 中的有效解決方案也是可以接受的。
這是我的代碼:
<%= simple_form_for(@option) do |f| %>
<%= f.error_notification %>
<%= link_to 'Start assessments', url_for(controller: :assessments, action: :index), id: 'start_assessment' %>
<%= select_tag "skip_option", options_for_select([ "Yes", "No" ], "No"), id: 'skip_option', onchange: "reason_picker()" %>
<%= f.text_field :reason_for_skipping, id: 'reason_for_skipping' %>
<%= f.button :submit, 'Save Option' %>
<% end %>
<script type="text/javascript">
$(document).ready (
window.reason_picker = function () {
var selected = document.getElementById("skip_option").selectedIndex;
if (selected == 0) {
$("#reason_for_skipping").show();
$("#start_assessment").hide();
}
else {
$("#reason_for_skipping").hide();
$("#start_assessment").show();
}
}
);
</script>
不知道如何將 select_tag 中的值分配給隱藏的表單字段。
隱藏字段的行為與其他表單輸入一樣,因此應該可以:
$("#id_of_hidden_field").val($("#skip_option").val());
這是基於我收到的提示的完整工作代碼。 需要進行一些更改。 一些元素被重命名以防止 ID 沖突,並引入了一個新的隱藏元素。 同樣在模型類中,使用了一種將空字符串轉換為數據庫 NULL 值的方法。
這是文件_form.html.erb
<%= simple_form_for(@option) do |f| %>
<%= f.error_notification %>
<div class="form-inputs">
<table>
<thead>
<th>Action</th>
<th>Skip</th>
<th>Reason for skipping</th>
</thead>
<tbody>
<tr>
<td>
<%= link_to 'Start assessments', url_for(controller: :assessments, action: :index), id: 'start_assessment' %>
</td>
<td>
<%= f.hidden_field :skip_option %>
<%= select_tag "html_skip_option", options_for_select([ "Yes", "No" ], :selected => f.object.skip_option), id: 'html_skip_option', onchange: "reason_picker()" %>
</td>
<td>
<%= f.text_field :reason_for_skipping, id: 'reason_for_skipping' %>
</td>
</tr>
</tbody>
</table>
</div>
<div class="form-actions">
<%= f.button :submit, 'Save Option' %>
</div>
<% end %>
<script type="text/javascript">
$(document).ready (
window.reason_picker = function () {
var selected = document.getElementById("html_skip_option").selectedIndex;
if (selected == 0) {
$("#reason_for_skipping").show();
$("#start_assessment").hide();
}
else {
$("#reason_for_skipping").hide();
$("#start_assessment").show();
}
$("#option_skip_option").val($("#html_skip_option").val());
if ($("#option_skip_option").val() != "Yes") {
$("#reason_for_skipping").val("");
}
}
);
</script>
這是模型文件option.rb
class Option < ActiveRecord::Base
before_save :normalize
def normalize
self.reason_for_skipping = nil unless skip_option == "Yes"
end
end
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