我有两个模型:Activity
和Comment
. Comment
belongs_to :activity
和Activity
has_many :comments
。对于构建活动,我遵循了这个Railscast(从头开始的活动提要)
所以,我正在使用activity_presenter.rb
class ActivityPresenter < SimpleDelegator
attr_reader :activity
def initialize(activity, view)
super(view)
@activity = activity
end
def render_activity
div_for activity do
link_to((gravatar_for activity.user, {size: 20}) + activity.user.name, activity.user) + ' ' + render_partial
end
end
def render_partial
locals = {activity: activity, presenter: self}
locals[activity.trackable_type.underscore.to_sym] = activity.trackable
render partial_path, locals
end
def partial_path
partial_paths.detect do |path|
lookup_context.template_exists? path, nil, true
end || raise("No partial found for activity in #{partial_paths}")
end
def partial_paths
[
"activities/#{activity.trackable_type.underscore}/#{activity.action}",
"activities/#{activity.trackable_type.underscore}",
"activities/activity"
]
end
end
这使得_activities_feed.rb
部分@activities.each do |activity|
条件。
在这部分中,我有 3 个块:
activity
用于form for activity
更新目的activity.comments
阻止each do |comment|
activity.comments.new
(形式)
这是一个问题。我需要渲染Activity.comments
和表单以从控制器创建新评论comments
,因为我在一个视图中有 2 个表单和 2 个submit
按钮,它们调用 2 个update
或create
操作。而且,当然,我需要它来使应用程序逻辑更好。
但我不能发送activity
from @activities.each do |activity|
,我在这个部分到的任何地方都使用它comments_controller
。
我尝试添加@activity = Activity.find(params[:id])
, @comment = Activity.comments.new(params[:activity_id])
, @comments = Activity.comments.all
toactivities
和comments
控制器,也更改activity
为@activity
and 。但这无济于事。我认为,我不了解控制器之间交互的基本逻辑,但找不到我的错误。activity.comments.new
@comment
所以,我activities_controller
的index
行动是:
@activities = Activity.order('updated_at DESC')
而在comments_controller
我只有create
和destroy
行动,这工作正常。
谢谢你的帮助!
升级版:
这是我的_activities_feed.rb
结构:
<% @activities.each do |activity| %>
<%= form_for activity, remote: true do |a| %>
<%= ActivityPresenter.new(activity, self).render_activity %>
.
.
.
<%= link_to ... class: 'add_comment', remote: true %> # Shows activity.new.comment form
<%= link_to ... 'Edit' ... %> # edit activity link
<%= a.submit 'Update' %> # first submit button for submitting activity changes
.
.
.
<% activity.comments.each do |comment| %> # activity.comments block
<%= comment.text %>
<%= link_to comment.user.name, comment.user %>
<% end %>
.
.
.
<%= form_for activity.comments.new, remote: true do |f| %> # form for adding comment
<%= f.text_area :text, 'rows' => '2', class: 'comment_text' %>
<%= f.button 'Cancel', class: 'btn comment_cancel', type: 'button' %>
<%= f.submit 'Post', class: 'btn btn-primary', controller: 'comments' %> # second submit button
<%= f.hidden_field :activity_id, value: activity.id %>
<% end %>
<% end %>
<% end %>