我已经查看了至少10个关于此的问题,并尝试了所有内容(例如像this question),但没有一个建议有效,例如:
例如:
format.json head :no_content and return
抛出此错误:
ArgumentError (wrong number of arguments (given 2, expected 1)):
虽然这个:
format.json head and return
抛出此错误:
ArgumentError (wrong number of arguments (given 0, expected 1..2)):
这是我目前在控制器操作中所拥有的:
def paid
@user = User.find_by(id: session['user_id'])
respond_to do |format|
if !@user.nil?
@user.is_paid = true
@user.payment_reference = payment_params[:reference]
@user.save
format.json { render head, status: :no_content } and return
else
format.json render json: { message: "failed to record payment" }, status: :unprocessable_entity
end
end
end
这可行,但在控制台中抛出错误:
No template found for PaymentsController#paid, rendering head :no_content
我不想添加一个空模板来解决这个问题。我想告诉Rails我想渲染头:no_content!
This question表明在Rails 3.1中,默认生成的代码执行了此操作:
format.json { head :no_content }
但是在日志中显示的确是相同的错误。
答案 0 :(得分:3)
因此,事实证明这个动作是从ajax请求调用的,就像这样(注意没有指定dataType):
$.ajax({
type : 'POST',
beforeSend: function(xhr) {xhr.setRequestHeader('X-CSRF-Token', $('meta[name="csrf-token"]').attr('content'))},
url : '/payments/paid',
data: JSON.stringify(paymentObject),
contentType: 'application/json; charset=utf-8',
success: record_payment_success,
error: function() {
console.log('Error recording payment in db');
}
});
因此,如果我在rails中执行此操作,则有关缺少模板的错误将消失:
format.js { head :no_content }
所以js响应很好,所以如果我把ajax更改为:
$.ajax({
type : 'POST',
beforeSend: function(xhr) {xhr.setRequestHeader('X-CSRF-Token', $('meta[name="csrf-token"]').attr('content'))},
url : '/payments/paid',
data: JSON.stringify(paymentObject),
contentType: 'application/json; charset=utf-8',
dataType: 'json',
success: record_payment_success,
error: function() {
console.log('Error recording payment in db');
}
});
然后这适用于Rails:
format.json { head :no_content }
我收到了204 No Content响应,日志中没有错误。
Started POST "/payments/paid" for 127.0.0.1 at 2017-07-19 18:05:31 +0200
Processing by PaymentsController#paid as JSON
Parameters: {"payment"=>{"reference"=>"PAY-76D56139RT7576632LFXYGPA"}}
Completed 204 No Content in 181ms (ActiveRecord: 26.9ms)