Question

Rails 4.0 Ruby 2.0，SimpleForm 3.1.0.rc2

为什么在第二个示例中选择了它时，第一个示例中选择的默认值是不是？两个例子都是相同的形式。更重要的是，我想，我该如何解决它？感谢。

<%= f.input(:location_id, {input_html: {value: @car.location}, collection: Location.all.order("name").collect{|c| [c.name, c.id]}, prompt: "Location?"}) %>

<select id="car_location_id" class="select optional form-control form-control" value="Rcving" name="car[location_id]">
<option value="">Location?</option>
‌<option value="7">Manager</option>
‌<option value="9">Rcving</option>
‌<option value="8">Return</option>
‌<option value="10">RollBack</option>
‌<option value="6">Stock</option>
</select>

<%= f.input(:ymm_year_id, {input_html: {value: @car.year}, collection: YmmYear.all.order("year desc").collect{|c| [c.year, c.id]}, prompt: "Year?"}) %>

<select id="car_ymm_year_id" class="select optional form-control form-control" value="2013" name="car[ymm_year_id]">
<option value="9">2015</option>
‌<option value="10">2014</option>
‌<option value="8" selected="selected">2013</option>
‌<option value="7">2012</option>
‌<option value="6">2011</option>
‌<option value="5">2010</option>
‌<option value="2">2009</option>
‌<option value="4">2008</option>
‌<option value="1">2007</option>
‌<option value="3">2006</option>
‌<option value="13">2005</option>
‌<option value="17">2004</option>
‌<option value="14">2003</option>
‌<option value="11">2002</option>
‌<option value="16">2001</option>
‌<option value="15">2000</option>
‌<option value="12">1999</option>
</select>

表格是：

<div class="span8">
  <%= simple_form_for [:admin, @car],
                      defaults: {label: false},
                      html: {class: 'form-vertical'},
                      wrapper: :vertical_form,
                      wrapper_mappings: {
                              check_boxes: :vertical_radio_and_checkboxes,
                              radio_buttons: :vertical_radio_and_checkboxes,
                              file: :vertical_file_input,
                              boolean: :vertical_boolean
                      } do |f| %>
      <%= f.input(:stock_number, {input_html: {value: @car.stock_number},  disabled: true, autocomplete: :off, placeholder: 'Stock number?'}) %>
      <%= f.input(:ymm_year_id, {input_html: {value: @car.year}, collection: YmmYear.all.order("year desc").collect{|c| [c.year, c.id]}, prompt: "Year?"}) %>
      <%= f.input(:ymm_make_id, {input_html: {value: @car.make}, collection: YmmMake.makes(@car.ymm_year_id).collect{|c| [c.make, c.id]}, prompt: "Make?"}) %>
      <%= f.input(:ymm_model_id, {input_html: {value: @car.model}, collection: YmmModel.models(@car.ymm_make_id).collect{|c| [c.model, c.id]}, prompt: "Model?"}) %>
      <%= f.association(:color, {input_html: {value: @car.color}, autocomplete: :off, prompt: 'Color?'}) %>
      <%= f.input(:location_id, {input_html: {value: @car.location}, collection: Location.all.order("name").collect{|c| [c.name, c.id]}, prompt: "Location?"}) %>
      <div class="col-xs-6 col-sm-3">
        <br/>
        <%= f.button :submit %>
        <br/><br/>
      <%= link_to 'Delete Car', admin_car_path(@car), class: 'btn btn-warning', data: {confirm: 'Are you sure?'}, :method => :delete %>
      </div>
  <% end %>
</div>

使用表单运行的示例JQuery：

$("select[name='car[ymm_year_id]']").change(function () {
    // send a GET request to /ymm_makes with the 'year' parameter
    $.getJSON("/ymm_makes", {year: $(this).val()}, function (data) {
        var options_html = ['<option value="">Make?</option>'];
        // iterate over the JSON that we received back; each entry is one 'ymm_make'
        $.each(data, function (index, make) {
            if (index = 0) {options_html.push('<option value="">Make?</option>');}
            // make a new <option> tag for each make and push it into the options_html array
            options_html.push("<option value='" + make.id + "'>" + make.make + "</option>");
        });
        // put all our generated <options> tags into the <select> tag
        $('select#car_ymm_make_id').html(options_html.join('')).prop('disabled', false);
    });
});

编辑：使用不带id的变量修改代码：

<%= f.input(:location, {collection: Location.all.order("name").collect { |c| [c.name, c.id] }, prompt: "Location?"}) %>
<select id="car_location" class="select optional form-control form-control" name="car[location]">
<option value="7">Manager</option>
<option value="9">Rcving</option>
<option value="8">Return</option>
<option value="10">RollBack</option>
<option value="6">Stock</option>
</select>

Answer 1

因为位置变量是多态的，所以没有＆＃34;属于＆＃34;汽车协会。因此，不会设置值。为了实现这一点，我开发了一个JQuery，它准备好抓取值，实际上是select的ID，并设置值，如下所示：

<%= f.input(:location_id, {input_html: {value: @car.location_id}, collection: Location.all.order("name").collect { |c| [c.name, c.id] }, prompt: "Location?"}) %>

$("select[name='car[location_id]']").ready(function () {
    // Obtain the value attribute and set val parameter
    var location = $('#car_location_id').attr("value");
    $("#car_location_id").val(location);
});

感谢janfoeh带领我这个。 OBTW，我尝试使用location变量，但select需要ID。

Rails表单不会选择默认值

1 个答案: