Ruby on Rails 和 Cocoa - POST 将值作为 NULL 放入 DB

Question

我正在尝试向我的 Ruby on Rails 本地服务器发送 POST 请求。不幸的是，起初由于protect_from_forgery，它不会让我POST，所以我最终在开发和生产中将其设置为false。基本上，我的问题是我将从我的 Cocoa 应用程序发送带有所有需要的参数的 POST 请求，并且 Ruby 服务器会看到它。但是，每当服务器插入我的请求时，所有 VALUES 都设置为 NULL，但 created_at 和 updated_at 除外。我不知道 Ruby on Rails 是如何工作的（因为我使用了脚手架），所以我不确定我需要在哪里设置参数以便正确插入它们。

谢谢！

可可代码：

NSString *urlString = @"http://localhost:3000/clients";
NSURL *url = [[NSURL alloc] initWithString:urlString];
NSMutableURLRequest *req = [[NSMutableURLRequest alloc] initWithURL: url];
[req setHTTPMethod: @"POST"];

NSData *putParams = [@"name=TEST&ip_address=1.1.1.1" dataUsingEncoding:NSUTF8StringEncoding];
[req setHTTPBody: putParams];   

NSHTTPURLResponse* urlResponse = nil;  
NSError *error = [[NSError alloc] init];  
NSData *responseData = [NSURLConnection sendSynchronousRequest:req returningResponse:&urlResponse error:&error];  
NSString *result = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];

NSLog(@"Response Code: %d", [urlResponse statusCode]);
if ([urlResponse statusCode] >= 200 && [urlResponse statusCode] < 300)
    NSLog(@"Response: %@", result);

[url release];
[req release];
[error release];

服务器响应：

Processing ClientsController#create (for 17.224.23.62 at 2010-07-13 16:59:55) [POST]
Parameters: {"name"=>"TEST", "ip_address"=>"1.1.1.1"}
Client Create (0.3ms)   INSERT INTO "clients" ("name", "created_at", "updated_at", "ip_address") VALUES(NULL, '2010-07-13 23:59:55', '2010-07-13 23:59:55', NULL)
Redirected to http://17.224.23.62:3000/clients/6
Completed in 7ms (DB: 0) | 302 Found [http://17.224.23.62/clients]

Processing ClientsController#show (for 17.224.23.62 at 2010-07-13 16:59:55) [GET]
Parameters: {"id"=>"6"}
Client Load (0.1ms)   SELECT * FROM "clients" WHERE ("clients"."id" = 6) 
Rendering template within layouts/clients
Rendering clients/show
Completed in 7ms (View: 2, DB: 0) | 200 OK [http://17.224.23.62/clients/6]

我尝试在客户端控制器中执行此操作，但问题仍然存在：

if params[:name].present?
  @client = Client.new(:name => params[:names])
else
  @client = Client.new(params[:client])
end

以防万一（完整的客户端控制器 - 所有这些都带有支架）：

class ClientsController < ApplicationController

# GET /clients
# GET /clients.xml
def index
  @clients = Client.all

  respond_to do |format|
    format.html # index.html.erb
    format.xml  { render :xml => @clients }
  end
end

# GET /clients/1
# GET /clients/1.xml
def show
  @client = Client.find(params[:id])

  respond_to do |format|
    format.html # show.html.erb
    format.xml  { render :xml => @client }
  end
end

# GET /clients/new
# GET /clients/new.xml
def new
  @client = Client.new

  respond_to do |format|
    format.html # new.html.erb
    format.xml  { render :xml => @client }
  end
end

# GET /clients/1/edit
def edit
  @client = Client.find(params[:id])
end

# POST /clients
# POST /clients.xml
def create
  if params[:name].present?
    @client = Client.new(:name => params[:names])
  else
    @client = Client.new(params[:client])
  end

  respond_to do |format|
    if @client.save
      format.html { redirect_to(@client, :notice => 'Client was successfully created.') }
      format.xml  { render :xml => @client, :status => :created, :location => @client }
    else
      format.html { render :action => "new" }
      format.xml  { render :xml => @client.errors, :status => :unprocessable_entity }
    end
  end
end

# PUT /clients/1
# PUT /clients/1.xml
def update
  @client = Client.find(params[:id])

  respond_to do |format|
    if @client.update_attributes(params[:client])
      format.html { redirect_to(@client, :notice => 'Client was successfully updated.') }
      format.xml  { head :ok }
    else
      format.html { render :action => "edit" }
      format.xml  { render :xml => @client.errors, :status => :unprocessable_entity }
    end
  end
end

# DELETE /clients/1
# DELETE /clients/1.xml
def destroy
  @client = Client.find(params[:id])
  @client.destroy

  respond_to do |format|
    format.html { redirect_to(clients_url) }
    format.xml  { head :ok }
  end
end

end

附：如果我的问题不清楚，请告诉我。

Answer 1

您的控制器中有错字：@client = Client.new(:name => params[:names]) 应该是 @client = Client.new(:name => params[:name])。

这将解决部分问题，但这是问题的根源：

基本上，如果这是一个“真正的”Rails 应用程序，它会发送如下参数：

{ :client => { :name => x, :ip => y } }

然后您可以像这样访问 params[:client] 中的名称和 IP：

@client = Client.new(params[:client])

但是你正在发送：

{ :name => x, :ip => y }

所以你需要：

@client = Client.new(:name => params[:name], :ip => params[:ip])

为了让“Rails 方式”发挥作用，您可以修改您的 Objective-C 代码以发送参数，例如 client[name]=x&client[ip]=y。