ruby - Rails 3.2.1 associations no callbacks? -


First of all, I am using Rail 3.2.1 and ruby ​​1.9.3p392

I have many devices with one model, ad_user and device

one ad_user and one device one < code> ad_user .

My models are as follows: 

  Class AdUser & lt; ActiveRecord :: Base has has_many: Tools class tool & lt; ActiveRecord :: Base belongs_to: DEVICE_TYPE belongs_to: device_status belongs_to: ad_user validates_presence_of: Name validates_uniqueness_of: Name validates_presence_of: serial validates_uniqueness_of: serial validates_presence_of: device_type_id validates_presence_of: device_status_id validates_presence_of: ad_user_id before_update: before_update_call before_save: before_save_call before_create: before_create_call before_validation: before_validation_call def protect before_update_call P Self.name p self.ad_user_id p "- = - = - = - = - = - = - = - = -" p "before_update_call" self.ad_user_id = 1 if self.ad_user_id.nil? || Self.ad_user_id.blank? Def end before_save_call p self.name p self.ad_user_id p "- = - = - = - = - = - = - = - = -" "before_save_call" self.ad_user_id = 1 If self.ad_user_id.nil P? || self.ad_user_id.blank? Def end before_create_call p self.name p self.ad_user_id p "- = - = - = - = - = - = - = - = -" "before_create_call" self.ad_user_id = 1 If self.ad_user_id.nil p? || self.ad_user_id.blank? Def end before_validation_call p self.name p self.ad_user_id p "- = - = - = - = - = - = - = - = -" "before_validation_call" self.ad_user_id = 1 If self.ad_user_id.nil P? || self.ad_user_id.blank?   
  u = AdUser.first u.device_ids = [1,2]   
 I can see the code  before_validation_call ,  before_save_call  and  before_update_call  print for the console, but when I unassign these devices from the user with:  
  u.device_ids The result of this is a simple:  
  Set up SQL (2.0ms) update "Tools" "ad_user_id" = Where Where "Devices" . "Ad_user_id" = 405 and "Tools". In the "ID" (332, 333)   
 Any of the callbacks are called and in spite of the fact that zero attendance should be verified, despite the fact that < Code> ad_user_id  has expired  
 Am I doing anything wrong here    
  
 / Unfortunately, I think this is a required behavior when you update associations, you do not trust the callback. Want Therefore, the underlying model is contained as may be updated from  
 What you can do, however, instead attempted to reach  device  field.  device_ids  does at a lower level, different way.  
 Also consider using it, if it fits.  
 PS Just a small note: In the train you  self.ad_user.present?  can use  self.ad_user_id.nil? || self.ad_user_id.blank? . Additionally, you can merge the  validates_presence_of  statement.

Comments

Post a Comment

Popular posts from this blog

Java - Error: no suitable method found for add(int, java.lang.String) -

I'm in the middle of homework work and I'm stuck. At this point in my code, I think that I should have a GUI window that opens and allows me to type "inserted text number". Notice is not going anywhere but at this point, If I pass through the problem then it will be in a linked list. I am getting two of the same error for the lines. Add (index, element); And I can not seem to get past it, there is no suitable method for the error "add (int, java. string string)". Code is below, please advise. To clarify - this will not be a method error because it is a linked list. There should not be any way involved. import java.awt. *; Import java.awt.event. *; Import javax.swing. *; Import java.util. *; Import java.util.Scanner; Import java.util.LinkedList; Public class TopTenList JFrame {Private TopTenList tt; See the Private JTextArea list; Private JTextField cmdTextField; Private JTextField resultsTestfield; // This GUI window is the code for the public toptist...
Read more

java - JPA TypedQuery: Parameter value element did not match expected type -

I am using JPA 2.0 and getting the following code in the DAO layer: Public Zero Test () {string key = "status"; String [] Conditions = {"A", "B"}; & Lt; TestTable & gt; Results = Search (Keys, Conditions); } Public listing & lt; TestTable & gt; Search (string key, object value error) {string sql = "test ndf to testlet and jade nand." + Key + "in:" + key; TypedQuery & LT; TestTable & gt; Query = entityManager.createQuery (SQL, TestTable.class); Query.setParameter (key, Arrays.asList (valueArr)) / *** Error Line *** Return query.getResultList (); } In the above error line, it throws the following exception: java.lang.IllegalArgumentException: parameter value element [[Ljava.lang.String; @ cbe5bc] did not match the expected type [java.lang.String] Why is this expected type string while actually this string []? Please help! Note: This is derived from the normal routine and is a simplified code. I can no...
Read more

c++ - static template member variable has internal linkage but is not defined -

Yes, I know, there is a question with almost the same title, but it refers to a different situation. Error message) In my case, I have a .cpp file with a big named designation name (implementation details). There is a property class template with a static data member in that name space, which I need to access from outside the unknown namespace. I give it a little bit of meat: file.hpp namespace Bar {template & lt; Typename A & gt; Struct foo {static_assert (is_same & lt; a, float & gt; :: value} is_same & lt; a, double>: value, ""); Fixed zero set_static_var (a const & x); // ...}; } and file.cpp namespace {template & lt; Typename A & gt; Struct foo_traits {// supports the implementation of several static code bars: foo & lt; & Gt; Fixed A data; }; The template's & lt; & Gt; Float foo_traits & lt; Float & gt; :: datum; // No change if this is in the global namespace template & lt; & Gt; Doub...
Read more