渲染 .json.erb 模板时不调用 jQuery .done

Posted 2023-05-09

【中文标题】渲染 .json.erb 模板时不调用 jQuery .done

【英文标题】：jQuery .done is not called when rendering .json.erb template

【发布时间】：2017-12-21 03:02:48

【问题描述】：

我试图通过将响应从创建移动到视图来清理代码（使用了一些帮助程序，这是有道理的）。但是由于某种原因，我的 js 回调永远不会被调用。我 100% 感到困惑，所以这是我的日志和代码。非常感谢:-)

reviews_controller.rb

def create
    @review = Review.new(post_params)
    @review.library = @library if @library
    @review.user = current_user
    if !@review.save
        render json: error_code: "400", message: "Invalid paramaters"
    end
    respond_to do |format|
        format.html redirect_to(library_path(@library))
        format.json render "create.json"
    end
end

libraries.js（在页面上加载）

$(document).ready( function()
    $("#new_review").submit(function(event) 
        event.preventDefault();

        var form = $(this);

        var values = form.serialize();
        var url = form.attr("action");
        debugger;
        $.post(url + ".json", values).done(function(data) 
            debugger;
        );
    );
);

create.json.erb

    review: <%= @review.to_json %>, 
    average_rating: <%= number_to_human(@library.average_rating) %>

服务器日志

Started POST "/libraries/10/reviews.json" for 127.0.0.1 at 2017-07-16 10:12:18 -0400
Processing by ReviewsController#create as JSON
  Parameters: "utf8"=>"✓", "authenticity_token"=>"MgB1pj2lQNMgPCknUMP+lc2EWtrp06n1GkaAbrJONJwM//fmY7gI8azvy3IFh9NZfoRysoiVln3vAH+AFzW1QQ==", "review_rating_dispaly"=>"1", "review"=>"rating"=>"1", "comment"=>"", "library_id"=>"10"
  Library Load (0.2ms)  SELECT  "libraries".* FROM "libraries" WHERE "libraries"."id" = ? LIMIT 1  [["id", 10]]
  User Load (0.1ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = ?  ORDER BY "users"."id" ASC LIMIT 1  [["id", 1]]
   (0.1ms)  begin transaction
  SQL (0.3ms)  INSERT INTO "reviews" ("comment", "library_id", "user_id", "created_at", "updated_at") VALUES (?, ?, ?, ?, ?)  [["comment", ""], ["library_id", 10], ["user_id", 1], ["created_at", "2017-07-16 14:12:18.075609"], ["updated_at", "2017-07-16 14:12:18.075609"]]
   (5.6ms)  commit transaction
   (0.1ms)  SELECT AVG("reviews"."rating") FROM "reviews" WHERE "reviews"."library_id" = ?  [["library_id", 10]]
  Rendered reviews/create.json.erb (1.8ms)
Completed 200 OK in 16ms (Views: 4.2ms | ActiveRecord: 6.4ms)

chrome 网络日志中服务器的响应

    review: "id":37,"rating":1,"user_id":1,"library_id":10,"comment":"","created_at":"2017-07-16T14:23:25.213Z","updated_at":"2017-07-16T14:23:25.213Z", 
    average_rating: 1.86

【问题讨论】：

您在网络控制台上得到的响应是什么？

编辑的答案显示。它似乎返回了正确的数据，但不会调用 .done :-(

这不是有效的 JSON

不应该调用done吗？

很可能它试图将其解析为 JSON 并且失败了，因此不会调用 done 而调用 fail。

【参考方案1】：

在行定义前添加"，并在json中添加.html_safe

    "review": <%= @review.to_json(only: [:comment, :rating]).html_safe %>,
    "average_rating": <%= number_to_human(@library.average_rating) %>