socialforge/app/views/pull_requests/_form.html.erb

<div class="new_roadmap_conbox mb10" >
  <div class="new_roadmap_info_top clear  ">
    <h4 class=" new_roadmap_listtitle"> 新建Pull Request </h4>
  </div>
  <%= form_tag(url_for(:controller => 'pull_requests', :action => 'create', :project_id => @project.id, :forked_project_id => @forked_project.try(:gpid)), :id => 'pull_request_form', :method => "post", :remote => true) do %>
      <div class="clear new_roadmap_listbox">
        <ul class="PullReques_new_box ">
          <li class="mb10 clear">
            <label class=" fl PullReques_label">&nbsp;源分支&nbsp;&nbsp;:&nbsp;</label>
            <%= select_tag :branch, options_for_select(@source_rev), :id => "source_branch", :name => "source_branch", :value => "source_branch", :class => "fl PullReques_minselect" %>
            <label class=" fl ml10 ">&nbsp; 合并到目标分支&nbsp;&nbsp;:&nbsp;</label>
            <% if @forked_project.nil? %>
                <%= select_tag :branch, options_for_select(@source_rev), :id => "pull_request_branch", :name => "target_branch", :value => "target_branch",:class => "fl PullReques_minselect ml5" %>
            <% else %>
                <select onchange="choice_branch(this.value, document.getElementById('pull_request_branch'), <%= @source_rev %>, <%= @forked_rev %>);" id="pull_request_project" name="source_project" value="source_project" class="fl PullReques_minselect">
                  <option name="<%= @project.id %>" value="source_project_name" ><%= @source_project_name %></option>
                  <option name="<%= @forked_project.id %>" value="forked_project_name" ><%= @forked_project_name %></option>
                </select>
                <select name="target_branch" id="pull_request_branch" class = "fl PullReques_minselect ml5" >
                  <% @source_rev.each do |rev| %>
                      <option value="<%= rev %>"><%= rev %></option>
                  <% end %>
                </select>
            <% end %>
            <p id="pull_request_project_hidden" style="display: none"><%= @forked_project.nil? ? "" : @project.id %></p>
          </li>
          <div class="alert alert-blue mb10" id ="pull_request_branch_error" style="display: none">
            <span class="c_orange">您选择的源分支和目标分支为似乎没有差异，请将新改动提交至源分支或者切换到其它目标分支</span>
          </div>
          <li class="mb10 clear">
            <label class=" fl PullReques_label"><span class="c_red f12">*</span>&nbsp;标题&nbsp;&nbsp;:&nbsp;</label>
            <input type="text" id="pr_name" name="title" class="fl PullReques_maxinput" placeholder="请输入合并请求的标题" />
          </li>
          <div class="c_orange pl62 mb4" id ="pull_request_title" style="display: none">
            标题不能为空
          </div>
          <li class=" clear">
            <label class=" fl PullReques_label">&nbsp;描述&nbsp;&nbsp;:&nbsp;</label>
            <textarea type="text" name="description" class="PullReques_textarea fl mb10" placeholder="在此输入合并请求的描述"></textarea>
          </li>
          <li class="mb10 clear">
            <%= link_to "返回", project_pull_requests_path(:project_id => @project.id), :class => "btn btn-grey fr" %>
            <a href="javascript:void(0);" class="btn btn-blue fr mr5" onclick="pull_request_commit()">确定</a>
          </li>
        </ul>
      </div>
  <% end %>
</div>

<script>
    function regex_pr_name()
    {
        var name = $.trim($("#pr_name").val());
        if(name.length == 0)
        {
            $("#pull_request_title").show();
            return false;
        }
        else
        {
            $("#pull_request_title").hide();
            return true;
        }
    }

    function regex_branch()
    {
        var source_branch = $.trim($("#source_branch").val());
        var target_branch = $.trim($("#pull_request_branch").val());
        var target_project = $.trim($("#pull_request_project").children().attr("name"));
        var target_forked_project = $.trim($("#pull_request_project_hidden").text());
        if(target_project == target_forked_project && source_branch == target_branch)
        {
            $("#pull_request_branch_error").show();
            return false;
        }
        else
        {
            $("#pull_request_branch_error").hide();
            return true;
        }
    }

    //提交pull request
    function pull_request_commit()
    {
        if(regex_branch() && regex_pr_name())
        {
            $("#pull_request_form").submit();
        }
    }

     //切换项目时，替换分支
     $("#targetProject").change(function(){
        var defaultBranch = $("#targetBranch option:first-child").val();
        $("#targetBranch").val(defaultBranch);
    });
</script>