Question

我要把头发撕掉，所以我必须遗漏一些基本的东西......

我有以下表格（简化）：

<%= form_for(@public_call) do |f| %>
<div>Start: <%= f.date_select(:start_date,:start_year=>Time.now.year) -%></div>
<div>End: <%= f.date_select(:end_date,:start_year=>Time.now.year) -%></div>
<div>Deadline: <%= f.datetime_select(:submission_deadline,:start_year=>Time.now.year-1) -%></div>
<%- end -%>

表单发布到以下方法（简化）：

def update
  begin
    @public_call = PublicCall.find(params[:id])
    @public_call.update_attributes!(params[:public_call])
  rescue
    ...
  end
end

提交表单导致Rails记录器（简化）报告以下内容：

Parameters:
  {"public_call"=>
    {"start_date(1i)"=>"2012",
     "start_date(2i)"=>"9",
     "start_date(3i)"=>"30",
     "end_date(1i)"=>"2012",
     "end_date(2i)"=>"10",
     "end_date(3i)"=>"3",
     "submission_deadline(1i)"=>"2012",
     "submission_deadline(2i)"=>"4",
     "submission_deadline(3i)"=>"27",
     "submission_deadline(4i)"=>"23",
     "submission_deadline(5i)"=>"59"}
  }

问题在于：Rails似乎没有将这三个字段的参数转换为数据库的日期和日期时间对象，就像它应该的那样。 Rails记录器报告的查询是：

UPDATE `public_calls` SET `start_date`=NULL, `end_date`=NULL, `submission_deadline`=NULL, `updated_at`='2012-03-20 20:47:15' WHERE...

知道是什么给出了什么？

BTW，Rails 3.2.0 / Ruby 1.9.3。我在public_calls模型上的所有属性都不受保护。

谢谢！

修改

还尝试使用：update_attributes的：without_protection选项！但这也不起作用。

编辑＃2

我已经尝试调试ActiveRecord的AttributeAssignment模块中发生的事情，如下所示：

def assign_multiparameter_attributes(pairs)
  Rails.logger.info('ASSIGN_MULTIPARAMETER_ATTRIBUTES: '+pairs.inspect)
  execute_callstack_for_multiparameter_attributes(
    extract_callstack_for_multiparameter_attributes(pairs)
  )
end

def execute_callstack_for_multiparameter_attributes(callstack)
  errors = []
  Rails.logger.info('EXECUTE_CALLSTACK_FOR_MULTIPARAMETER_ATTRIBUTES: '+callstack.inspect)
  callstack.each do |name, values_with_empty_parameters|
    begin
      send(name + "=", read_value_from_parameter(name, values_with_empty_parameters))
    rescue => ex
      errors << AttributeAssignmentError.new("error on assignment #{values_with_empty_parameters.values.inspect} to #{name}", ex, name)
    end
  end
  unless errors.empty?
    raise MultiparameterAssignmentErrors.new(errors), "#{errors.size} error(s) on assignment of multiparameter attributes"
  end
end

def extract_callstack_for_multiparameter_attributes(pairs)
  Rails.logger.info('EXTRACT_CALLSTACK_FOR_MULTIPARAMETER_ATTRIBUTES: '+pairs.inspect)
  attributes = { }
  pairs.each do |pair|
    multiparameter_name, value = pair
    attribute_name = multiparameter_name.split("(").first
    attributes[attribute_name] = {} unless attributes.include?(attribute_name)
    parameter_value = value.empty? ? nil : type_cast_attribute_value(multiparameter_name, value)
    attributes[attribute_name][find_parameter_position(multiparameter_name)] ||= parameter_value
  end
  Rails.logger.info('EXTRACT_CALLSTACK_FOR_MULTIPARAMETER_ATTRIBUTES: '+attributes.inspect)
  attributes
end

这就是我得到的：

ASSIGN_MULTIPARAMETER_ATTRIBUTES: [["start_date(1i)", "2012"], ["start_date(2i)", "9"], ["start_date(3i)", "30"], ["end_date(1i)", "2012"], ["end_date(2i)", "10"], ["end_date(3i)", "3"], ["submission_deadline(1i)", "2012"], ["submission_deadline(2i)", "4"], ["submission_deadline(3i)", "27"], ["submission_deadline(4i)", "23"], ["submission_deadline(5i)", "59"]]
EXTRACT_CALLSTACK_FOR_MULTIPARAMETER_ATTRIBUTES: [["start_date(1i)", "2012"], ["start_date(2i)", "9"], ["start_date(3i)", "30"], ["end_date(1i)", "2012"], ["end_date(2i)", "10"], ["end_date(3i)", "3"], ["submission_deadline(1i)", "2012"], ["submission_deadline(2i)", "4"], ["submission_deadline(3i)", "27"], ["submission_deadline(4i)", "23"], ["submission_deadline(5i)", "59"]]
EXTRACT_CALLSTACK_FOR_MULTIPARAMETER_ATTRIBUTES: {"start_date"=>{1=>2012, 2=>9, 3=>30}, "end_date"=>{1=>2012, 2=>10, 3=>3}, "submission_deadline"=>{1=>2012, 2=>4, 3=>27, 4=>23, 5=>59}}

为什么没有调用execute_callstack_for_multiparameter_attributes方法的任何想法？

Answer 1

升级你的rails版本 - 我遇到了同样的问题，从v 3.2.0转到v 3.2.8解决了它。

Rails date_select和update_attributes

1 个答案: