我有一个可以响应 HTML 和 JSON 客户端请求的 rails 3 控制器。这个控制器有一个“create”方法,它创建一个新的“用户”模型对象,其值发布在 params[:user] 中。当用户参数值从 HTML 表单发布时,这将按预期工作。但是,当从 JSON 客户端(在我的情况下为 iOS)发布到此操作时,params[:user] 为 nil;我确实注意到,如果直接访问 params 哈希确实包含正确的值,即 params[:username] => "someusername"
我需要在 HTTP 请求中添加什么内容,以便可以在控制器中使用 params[:model_name] 语法吗?我正在使用 ASIFormDataRequest.m 发布到我的 Rails 应用程序。
我的客户端 POST 如下所示:
-(void)createUser:(NSString *)first
lastName:(NSString *)last
userName:(NSString *)user
email:(NSString *)email
password:(NSString *)password{
NSString *stringFormat = [NSString stringWithFormat:@"%@users.json", serviceBaseURL];
NSURL *url = [NSURL URLWithString:stringFormat];
ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:url];
User *requestedUser = [[User alloc]initWithId:nil firstName:first lastName:last userName:user email:email password:password];
request.tag = CREATE_USER;
request.userInfo = [NSDictionary dictionaryWithObject:requestedUser forKey:@"requestedUser"];
[request setPostValue:first forKey:@"first_name"];
[request setPostValue:last forKey:@"last_name"];
[request setPostValue:user forKey:@"username"];
[request setPostValue:email forKey:@"email"];
[request setPostValue:password forKey:@"password"];
request.Delegate = self;
[request startAsynchronous];
}
控制器的“创建”方法如下所示:
def create
@user = User.new(params[:user])
if @user.save #This will fail because params[:user] is nil when posted from iOS!
flash[:notice] = {:success => "User Created."}
session[:user_id] = @user.id
session[:username] = @user.username
respond_to do |format|
format.json {render :json => @user}
format.html{redirect_to(:controller => 'lists', :action => 'index')}
end
else
flash[:notice] = {:error => @user.errors}
respond_to do |format|
#format.json {render :json => @user.errors}
format.json {render :json => params[:username]} #This has a value. So the form parameters are sent.
format.html{render('new')}
end
end
end