我使用的是 API 而不是数据库,所以我使用的不是 ActiveRecord,而是 ActiveModel(我主要喜欢这里:railscasts.com/episodes/219-active-model)
问题是,当我尝试编辑一个项目(在我的例子中是一个 parking 位)时,表单的 Action 仍然是创建的 Action 而不是更新。
所以当我继续/parkings/2/edit 编辑一个 parking 位时,表格仍然是:
<form accept-charset="UTF-8" action="/parkings" class="form-horizontal" id="new_parking" method="post">
当它应该更像 put 隐藏字段和 parkings/2 作为 Action 时:
<form accept-charset="UTF-8" action="/parkings/2" class="form-horizontal" id="edit_parking" method="post"><div style="margin:0;padding:0;display:inline"><input name="utf8" type="hidden" value="✓" /><input name="_method" type="hidden" value="put" />
有人知道根据路由设置form_for的方法和 Action 在哪里吗?我想做的是尽可能接近于将 ActiveRecord 与数据库一起使用。
这是一些代码:
_form.html.erb
<%= form_for(@parking, :html => { :class => "form-horizontal" }) do |f| %>
...
<% end %>
edit.html.erb & new.html.erb,就是有
<%= render 'form' %>
Controller
class ParkingsController < ApplicationController
def index
@parkings = Parse.get("Parking")
respond_to do |format|
format.html
format.json { render :json => @parking }
end
end
def new
@parking = Parking.new
respond_to do |format|
format.html
format.json { render :json => @parking }
end
end
def edit
@parking = Parking.find(params[:id])
respond_to do |format|
format.html
format.json { render :json => @parking }
end
end
def create
@parking = Parking.new(params[:parking])
if (@parking.save)
flash[:success] = "Parking was just added!"
redirect_to :action => "new"
else
render :action => "new"
end
end
def update
# Testing
parking = Parse.get("Parking", params[:id])
parking.delete("updatedAt")
parking["name"] = params[:parking][:name]
parking.save
redirect_to :action => "index"
end
型号
class Parking
include ActiveModel::Validations
include ActiveModel::Conversion
extend ActiveModel::Naming
attr_accessor :name, :address, :city, :longitude, :latitude, :contributor_name, :contributor_email
validates_presence_of :name, :address, :city, :longitude, :latitude
@id = nil
def initialize(attributes = {})
attributes.each do |name, value|
send("#{name}=", value)
end
end
def self.find(id)
@id = id
raw = Parse.get("Parking", @id.to_s)
parking = Parking.new
parking.name = raw["name"]
parking.address = raw["address"]
parking.city = raw["city"]
parking.longitude = raw["location"]["longitude"]
parking.latitude = raw["location"]["latitude"]
parking.contributor_name = raw["contributorName"]
parking.contributor_email = raw["contributorEmail"]
return parking
end
def save
if (!valid?)
return false
else
parking = Parse::Object.new("Parking")
data =
{
:longitude => longitude.to_f,
:latitude => latitude.to_f
}
point = Parse::GeoPoint.new(data)
parking["location"] = point
parking["name"] = name
parking["address"] = address
parking["city"] = city
parking["contributorName"] = contributor_name
parking["contributorEmail"] = contributor_email
if (parking.save)
return true
end
end
end
def persisted?
false
end
end
请注意,创建工作正常,如果我使用 Web Inspector 或 Firebug 在表单 action=""中添加我的 parking ID,并在我的 form_for 中添加 :method => "put",我的记录会成功更新.
这里真正的问题实际上是 form_for 操作和方法,当我编辑 parking 位时它没有得到更新,并且仍然像我添加一个新 parking 位一样。
我还在学习 Rails,如果有些信息不清楚,请见谅!
谢谢!
--- 解决方案 ---
坚持?不应该只返回 false,我的模型需要定义一个返回对象 id 的方法(这样他们就可以更新 action="")所以这是我更新的模型:
class Parking
include ActiveModel::Validations
include ActiveModel::Conversion
extend ActiveModel::Naming
attr_accessor :objectId, :name, :address, :city, :longitude, :latitude, :contributor_name, :contributor_email
validates_presence_of :name, :address, :city, :longitude, :latitude
@id = nil
def initialize(attributes = {})
attributes.each do |name, value|
send("#{name}=", value)
end
end
def self.find(id)
raw = Parse.get("Parking", id.to_s)
parking = Parking.new
parking.objectId = id
parking.name = raw["name"]
parking.address = raw["address"]
parking.city = raw["city"]
parking.longitude = raw["location"]["longitude"]
parking.latitude = raw["location"]["latitude"]
parking.contributor_name = raw["contributorName"]
parking.contributor_email = raw["contributorEmail"]
return parking
end
def save
if (!valid?)
return false
else
parking = Parse::Object.new("Parking")
data =
{
:longitude => longitude.to_f,
:latitude => latitude.to_f
}
point = Parse::GeoPoint.new(data)
parking["location"] = point
parking["name"] = name
parking["address"] = address
parking["city"] = city
parking["contributorName"] = contributor_name
parking["contributorEmail"] = contributor_email
if (parking.save)
return true
end
end
end
def update_attributes(aParking)
parking = Parse.get("Parking", @id.to_s)
parking.delete("updatedAt")
parking["name"] = aParking["name"]
parking.save
return true
end
def destroy
parking = Parse.get("Parking", @id)
#parking.parse_delete
end
def id
return self.objectId
end
def persisted?
!(self.id.nil?)
end
end
最佳答案
我认为您的问题出在模型的 persisted?
方法中。由于它始终返回 false,Rails 始终认为它正在为新创建的记录构建表单,因此它使用 POST 并提交到集合 URL。
您需要在该方法中使用某种逻辑,以便现有记录返回 true 而新记录返回 false。
关于ruby-on-rails - 没有 ActiveRecord 的 form_for,表单操作不更新,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/9577975/