如果我有这样的参数:
params["scholarship"] = {"name"=>"test", "state_ids"=>["1", "2", "3", "4"]}
当我创建对象到数据库字段state_id不保存到数据库？
如何使用格式保存到数据库:
#<Scholarship id: 1, name: "test", state_id: "["1", "2", "3", "4"]">
怎么办？
谢谢你
如果用户在rails中添加了错误的URL,如何救援未找到的页面.如果网址无效,我希望在公共文件夹中显示404页面.怎么做？我正在浏览它但找不到解决方案.我尝试了很多方法来解决问题,但它们似乎没有起作用.我被困在这里,请帮忙.
如何在form中设置方法以将form_tag放入rails？中,我有这样的form_tag:
<%= form_tag(url, :method => :put, :multipart => true, :class =>"form-horizontal") do %>
......
<% end %>
但如果我检查元素,形式没有方法"放"但仍然"发布"？
<form accept-charset="UTF-8" action="/admin/stores/1/information/social_update" class="form-horizontal" enctype="multipart/form-data" method="post">
....
</form>
为什么？？？
我想扫描JS数组并确定所有元素是否唯一,或者数组是否包含重复项.
例如:
my_array1 = [1, 2, 3]
my_array2 = [1, 1, 1]
我想得到这样的结果:
my_array1 must be return true, because this array element is unique
and array2 must be return false, because this array element is not unique
我怎么能写这个方法？
我想从URL解析body属性.
例如:
url = 'http://rca.yandex.com/?key=rca.1.1.20140120T051507Z.3db118ab435efdff.6c84331313b6b7d66abd191410f72e0e1c3c8795&url=http://endtimeheadlines.wordpress.com/2014/01/17/think-tank-extraordinary-crisis-needed-to-preserve-new-world-order/#comment-36708?utm_source=twitterfeed&utm_medium=facebook[&callback=http://64.191.99.245:3023/posts][&full=1]'
当我尝试:
page = Nokogiri::HTML(html)
我明白了:
#<Nokogiri::HTML::Document:0x52fd6d6 name="document" children=[#<Nokogiri::XML::DTD:0x52fd1f4 name="html">, #<Nokogiri::XML::Element:0x52fc6aa name="html" children=[#<Nokogiri::XML::Element:0x5301f56 name="body" children=[#<Nokogiri::XML::Element:0x53018d0 name="p" children=[#<Nokogiri::XML::Text:0x53015f6 "http://rca.yandex.com/?key=rca.1.1.20140120T051507Z.3db118ab435efdff.6c84331313b6b7d66abd191410f72e0e1c3c8795&url=http://endtimeheadlines.wordpress.com/2014/01/17/think-tank-extraordinary-crisis-needed-to-preserve-new-world-order/#comment-36708?utm_source=twitterfeed&utm_medium=facebook[&callback=http://64.191.99.245:3023/posts][&full=1]">]>]>]>]>
如何获取此URL中的属性？
例如:page.css("div").我想从HTML中获取价值body.
如何在ruby中合并基于哈希的相同键的数组？
例如:
a = [{:a=>1},{:a=>10},{:b=>8},{:c=>7},{:c=>2}]
如何获得这样的结果？
a = [{:a=>[1, 10]},{:b=>8},{:c=>[7, 2]}]
谢谢你
我尝试在rails 4中使用carrierwave保存图像文件,但是当提交按钮时单击数据库是否回滚??? 为什么？
如果我不选择图像上传,只发送字符串,所有工作正常但如果我发送图像文件我得到这样的错误:
TypeError: can't cast ActionDispatch::Http::UploadedFile to string: INSERT INTO "items" ("created_at", "description", "image", "name", "store_id", "sub_items", "title", "updated_at") VALUES (?, ?, ?, ?, ?, ?, ?, ?)
(0.2ms) rollback transaction
*** ActiveRecord::StatementInvalid Exception: TypeError: can't cast ActionDispatch::Http::UploadedFile to string: INSERT INTO "items" ("created_at", "description", "image", "name", "store_id", "sub_items", "title", "updated_at") VALUES (?, ?, ?, ?, ?, ?, ?, ?)
我的看法 :
<%= form_for @items, :url => dashboard_create_items_path(@store.id), :html => {:multipart => true} do |f| %>
<%= f.label …如何使用javscript获取数组对象的所有值？
示例html:
<tr>
<td class="my_name">udin</td>
<td class="my_name">juned</td>
<td class="my_name">saepudin</td>
</tr>
如何使用javascript从class ="my_name"获取所有值？
我的javascript:
<script>
$(document).ready(function() {
var array_of_name = $(".my_name");
// how to get all value from my object array ?
// i want get result like this : ["udin", "juned", "saepudin"] ?
});
</script>
怎么实现呢？
如何使用ruby中的正则表达式计算字符串中数字和字符的长度？如果我有这样的情况,如何解决？例如:
abc = "12345678a"
使用正则表达式计数后,我想得到这样的结果:
number = 8
char = 1
怎么做？
如何在javascript中收集对象数组,例如我在这种情况下有这个数组:
var abc = [{"name": "udin", "checked": true}, {"name": "kabayan": "checked": true}, {"name": "hebring"}];
如何得到这样的结果:
abc = [{"name": "udin", "checked": true}, {"name": "kabayan": "checked": true}];
我只想显示"checked"== true的元素
我正在尝试使用poltergeist进行测试,但是当我运行测试时,浏览器没有显示.
这是我的spec_helper.rb:
# This file is copied to spec/ when you run 'rails generate rspec:install'
ENV["RAILS_ENV"] ||= 'test'
require File.expand_path("../../config/environment", __FILE__)
require 'rspec/rails'
require 'rspec/autorun'
require 'rspec/page-regression'
require 'capybara/rspec'
require 'capybara/rails'
require 'capybara/poltergeist'
Capybara.register_driver :poltergeist do |app|
#Capybara::Poltergeist::Driver.new(app, {debug: true, :timeout => 90})
Capybara::Poltergeist::Driver.new(app, {debug: false, :default_wait_time => 30, :timeout => 90})
end
Capybara.javascript_driver = :poltergeist
# Requires supporting ruby files with custom matchers and macros, etc,
# in spec/support/ and its subdirectories.
Dir[Rails.root.join("spec/support/**/*.rb")].each {|f| require f}
RSpec.configure …如何在模型轨道4内添加格式为mm/dd/yyyy的日期验证？
所以,我只想在模型中创建一个格式为mm/dd/yyyy的日期.
我怎么做？
如何组合数组并将其转换为字符串？我有两个数组:
a = ["09:00", "10:00", "11:00", "12:00"]
b = ["09:30", "10:30", "11:30", "12:30"]
如何以此格式获取结果字符串？
c = '"09:00" - "09:30", "10:00" - "10:30", "11:00" - "11:30", "12:00" - "12:30"'