Question

当我尝试在我的视图中使用ajax渲染微博时，我遇到了这个问题：

表单中的第一个参数不能包含nil或为空

正在创建Micoposts但由于某些原因它们在javascript文件中为零或空。我可以意识到我的索引视图中存在某种冲突，因为我正在呈现帖子形式和每个帖子的评论表单，所以我想也许是与我在索引视图中实例化的变量有关的因为当我替换时评论此行

<%= bootstrap_form_for([micropost, @comment], remote: true) do |f| %>

与

<%= bootstrap_form_for([micropost, micropost.comments.build], remote: true) do |f| %>

一切正常但我的评论表单中的字段错误没有显示

#posts_controller

def new
  if logged_in?
    @micropost = current_user.microposts.build
    @comment = @micropost.comments.build
    @feed_items = current_user.feed
  else
end

def create
  @micropost = current_user.microposts.build(micropost_params)

  respond_to do |format|
    if @micropost.save
      format.html { redirect_to root_url }
      format.js
    else
        format.html { render action: "index" }
      format.js
    end
  end 
end

# _form_micropost.html.erb

<%= bootstrap_form_for(@micropost, remote: true) do |f| %>
<% end %>

# _form_comment.html.erb
<%= bootstrap_form_for([micropost, @comment], remote: true) do |f| %>
<% end %>

create.js.erb

<% if @micropost.errors.any? %>
  $("#form-micropost-container").html("<%=escape_javascript(render('shared/form_micropost')) %>");
<% else %>
  var micropost = $("<%= escape_javascript(render(@micropost)) %>").hide().fadeIn("slow");
  $("#feed-container").prepend(micropost);
<% end %>

Answer 1

尝试明确传递所有参数：

#posts_controller

def new
  if logged_in?
    @micropost = current_user.microposts.build
    @comment = @micropost.comments.build
    @feed_items = current_user.feed
  else
end

def create
  @micropost = current_user.microposts.build(micropost_params)
  @comment = #assign comment here

  respond_to do |format|
    if @micropost.save
      format.html { redirect_to root_url }
      format.js
    else
        format.html { render action: "index" }
      format.js
    end
  end 
end

# _form_micropost.html.erb

<%= bootstrap_form_for(micropost, remote: true) do |f| %>
<% end %>

# _form_comment.html.erb
<%= bootstrap_form_for([micropost, comment], remote: true) do |f| %>
<% end %>

create.js.erb

<% if @micropost.errors.any? %>
  $("#form-micropost-container").html("<%=escape_javascript(render('shared/form_micropost', micropost: @micropost)) %>");
<% else %>
  var micropost = $("<%= escape_javascript(render('form_comment', micropost: @micropost, comment: @comment)) %>").hide().fadeIn("slow");
  $("#feed-container").prepend(micropost);
<% end %>

使用javascript渲染部分时，表单中的第一个参数不能包含nil或为空

1 个答案: