我希望我的索引根据价格下降和价格上涨来改变,就像亚马逊一样。
现在,我向网站发送一个ajax请求,其中select的新值请求数据。该站点从数据库中获取数据并对其进行排序。
我的javascript如何使用已排序的图书回复重绘我的索引页面中的卡片?
BookController.rb
def index
if params.dig("book", "title").nil? && params.dig("users", "university").nil?
@books = Book.where({title: params.dig("book", "title")})
.joins(:user).where(users: {university: params.dig("users", "university")})
elsif !params.dig("book", "title").nil? && params.dig("users", "university").nil?
@books = Book.where({title: params.dig("book", "title")})
elsif params.dig("book", "title").nil? && !params.dig("users", "university").nil?
@books = Book.joins(:user).where(users: {university: params.dig("users", "university")})
else
@books = Book.all
end
case params[:sort]
when "Price Descending"
@books.order(price_cents: "DESC")
when "Price Ascending"
@books.order(price_cents: "ASC")
else
@books.sort_by(&:created_at)
end
end
预订Index.html.erb
<select id="priceSelect">
<option value="Best Results" selected="selected">Best Results</option>
<option value="Price Descending">Price Descending</option>
<option value="Price Ascending">Price Ascending</option>
</select>
.
.
.
<% @books.each do |book| %>
<div class="col-xs-12 selectable-card">
<%= link_to book_path(book.id) do %>
...
<% end %>
</div>
<% end %>
<script>
$('#priceSelect').change(function(){
$.ajax({
url: "books",
type: "GET",
data: {sort: $('#priceSelect :selected').val()},
success:function(result){
console.log(result);
},
})
});
</script>
最后我的routes.rb
resources :books do
resources :users
end
答案 0 :(得分:1)
这个答案可能有语法错误或其他问题,正如我在这里写的那样,没有经过测试。它只是如何做到这一点的指南。采取这些想法并纠正任何可能的问题。
在你的控制器中你可以返回一个json对象:
respond_to do |format|
format.html
format.json { render json: @books }
end
在你的html中,添加一个div来标记要替换的区域:
<div class ="books-info">
<% @books.each do |book| %>
<div class="col-xs-12 selectable-card">
<%= link_to book_path(book.id) do %>
...
<% end %>
</div>
<% end %>
</div>
在你的javascript中你应该处理json响应并构建html来替换原始列表:
<script>
$('#priceSelect').change(function(){
$.ajax({
url: "books",
type: "GET",
data: {sort: $('#priceSelect :selected').val()},
success:function(ret){
// new code;
var books = JSON.parse(ret); // Not sure if necessary or you can use 'ret'
var length = books.length;
var html = "";
for (var i = 0; i < length; i++) {
html += "<div class='col-xs-12 selectable-card'>";
html += "<a href='" + books[i].id + "'>" + books[i].name + "</a>";
html += "</div>";
}
$('.books-info').innerHTML = html
},
})
});
</script>