我在创建reddit克隆时正在学习ruby
到目前为止，我已经为帖子创建了字幕，帖子，评论和投票系统。
剩下的唯一要做的事情就是评论的投票系统和业力系统。
我基本上是尝试复制我的投票系统以发布帖子并将其缩放为评论，但是在遇到每个步骤的错误后，我决定在这里询问如何修改现有代码。
votes_controller：
（您可以在此处看到我如何尝试修改我的代码，它已被注释掉）
class VotesController < ApplicationController
def create
post_id = params[:post_id]
vote=Vote.new
vote.post_id = params[:post_id]
vote.upvote = params[:upvote]
vote.account_id = current_account.id
#Existing vote check
existing_vote = Vote.where(account_id: current_account.id, post_id: post_id)
@new_vote = existing_vote.size<1
respond_to do |format|
format.js{
if existing_vote.size > 0
existing_vote.first.destroy
else
if vote.save
@success=true
else
@success = false
end
end
@post = Post.find(post_id)
@is_upvote = params[:upvote]
render "votes/create"
}
end
end
# comment_id = params[:comment_id]
# vote=Vote.new#(vote_params)
# vote.comment_id = params[:comment_id]
# vote.upvote = params[:upvote]
# vote.account_id = current_account.id
# #Existing vote check
# existing_vote_comment = Vote.where(account_id: current_account.id, comment_id: comment_id)
# @new_vote_comment = existing_vote.size<1
# respond_to do |format|
# format.js{
# if existing_vote_comment.size > 0
# existing_vote_comment.first.destroy
# else
# if vote.save
# @success=true
# else
# @success = false
# end
# end
# @comment = Comment.find(comment_id)
# @is_upvote_comment = params[:upvote]
# render "votes/create"
# }
# end
# end
private
def vote_params
params.require(:vote).permit(:upvote, :post_id)
# params.require(:vote).permit(:upvote, :comment_id)
end
end
vote.js：
$(function() {
console.log('jquery loaded ');
$(".vote").on("click", ".upvote, .downvote", function() {
var post_id = $(this).parent().data("id"),
is_upvote = $(this).hasClass("upvote");
console.log("upvote for post " + post_id);
console.log("is an upvote post" + is_upvote);
$.ajax({
url: "/post/vote",
method: "POST",
data: { post_id: post_id, upvote: is_upvote },
success: function() {
console.log("success..")
}
});
});
});
vote.rb：
class Vote < ApplicationRecord
belongs_to :account
belongs_to :post
validates_uniqueness_of :account_id, scope: :post_id
after_create :increment_vote
after_destroy :decrement_vote
private
def increment_vote
field = self.upvote ? :upvotes : :downvotes
Post.find(self.post_id).increment(field).save
end
def decrement_vote
field = self.upvote ? :upvotes : :downvotes
Post.find(self.post_id).decrement(field).save
end
end
vote_comment.rb（基本修改为表决的版本）：
class VoteComment<ApplicationRecord
belongs_to :account
belongs_to :comment
validates_uniqueness_of :account_id, scope: :comment_id
after_create :increment_vote
after_destroy :decrement_vote
private
def increment_vote
field = self.upvote ? :upvotes : :downvotes
Comment.find(self.comment_id).increment(field).save
end
def decrement_vote
field = self.upvote ? :upvotes : :downvotes
Comment.find(self.comment_id).decrement(field).save
end
end
部分，用于显示和发送投票：
<div id="vote-actions-<%=comment.id%>" class="vote" data-id="<%=comment.id%>">
<div class ="fa fa-arrow-up upvote <%= is_upvoted comment%>" ></div>
<span class="font-weight-bold score"><%=@comment.score%></span>
<div class ="fa fa-arrow-down downvote <%= is_downvoted comment%> "></div>
create.js.erb：
$("#vote-actions-<%=@post.id%> .score").text("<%=@post.score%>");
$("#vote-actions-<%=@post.id%> .downvote, #vote-actions-<%=@post.id%> .upvote ").removeClass("active");
<% if @new_vote %>
<% if @is_upvote == "true" %>
$("#vote-actions-<%=@post.id%> .upvote").addClass("active");
<% else %>
$("#vote-actions-<%=@post.id%> .downvote").addClass("active");
<% end %>
<% end %>
部分架构文件：
create_table "votes", force: :cascade do |t|
t.bigint "account_id"
t.bigint "post_id"
t.boolean "upvote"
t.datetime "created_at", precision: 6, null: false
t.datetime "updated_at", precision: 6, null: false
t.index ["account_id"], name: "index_votes_on_account_id"
t.index ["post_id"], name: "index_votes_on_post_id"
end
create_table "votescomments", force: :cascade do |t|
t.bigint "account_id"
t.bigint "comment_id"
t.boolean "upvote"
t.datetime "created_at", precision: 6, null: false
t.datetime "updated_at", precision: 6, null: false
t.index ["account_id"], name: "index_votescomments_on_account_id"
t.index ["comment_id"], name: "index_votescomments_on_comment_id"
end