similar to: inverse_of breaks for unsaved child associations during save of parent

This feels more like a question to ask the core list, forgive me if I trespass. I''ve been trying to help one of my cow orkers get through a sticky problem. He''s got a fairly complex nested form to update a model and its children. He''s started adding some validations, and we''ve encountered a number of issues: First he had a validation on one of the child

I''m having trouble with a validation that depends on an attribute of a belongs_to parent. If the child is added to an unsaved parent (parent.children << new child), the has_many collection parent.children includes the unsaved child. However the belongs_to attribute child.parent appears to be nil until the parent has been saved. Without access to the parent attributes, the validation

I was looking through the association classes in the rails 3 source and noticed that we aren''t supporting bi-directional associations with has_many and belongs_to: # NOTE - for now, we''re only supporting inverse setting from belongs_to back onto # has_one associations. def we_can_set_the_inverse_on_this?(record) @reflection.has_inverse?

The below query fails: Timesheet.joins(:time_entries).select("timesheets.*, sum(time_entries.worktime) as total").group("timesheets.start_date") The models have the following relations: Timesheet < AR has_many :activities, dependent: :destroy, inverse_of: :timesheet has_many :time_entries, through: :activities accepts_nested_attributes_for :activities,

When using has_one or has_many associations, how do I prevent a call to the parent''s save() method from calling the child''s save() method? I seem to be stuck in an infinite loop due to the way I have my associations setup :-( thanks, Tim

If I have... class Parent has_many :children end class Child belongs_to :parent end ...then... * Assigning a _new_ child during parent''s creation saves the child record with the parent''s id. child = Child.new Parent.create(:children => [child]) # Results in child being associated with parent * Assigning an existing child after a parent''s creation

Given the two tables Parent, Child where Parent has_many children: If I don''t save parent first then it seems that child.parent will not be assigned automatically if I call parent.children << child . Must the parent record be saved before I call parent.children << child ? If I must save Parent first then can someone explain to me how I can call parent.valid? before it

Hi guys! class Parent < ActiveRecord::Base has_many :children end class Child < ActiveRecord::Base belongs_to :parent end I do: parent = Parent.find(1, :include => :children) parent.children.find(3).update_attribute(''name'', ''Tom'') (or parent.children.find(3).name = ''Tom'') parent.children.find(3).name => ''old

Right now when you add a record to an association with << it first saves the model, and THEN sets the inverse_of association afterward. This is done inside add_record_to_target_with_callback inside association_collection.rb. Is there any reason set_inverse_instance isn''t called before the save of the model? We are referencing the parent in our save callbacks, so we''re

dear all, apologizes for this OT =========================== 28th International Workshop on Statistical Modelling (IWSM), Palermo (Italy) 8-12 July 2013. http://iwsm2013.unipa.it Dear friend, For your information, I would like to bring to your attention that deadline for submission of abstracts is FEBRUARY 18 If you are still interested to visit Palermo (and taste its specialities :-))

For an Xray file system patients have folders and folders have studies. That is: patients folders studies id id id name patient_id folder_id ... label type ... ... The list of studies with their associated folder and patient might look like this: name folder_label study_type

Full_Name: Ana Nelson Version: R 2.7.0 GUI 1.24 (5102) OS: OSX 10.5.2 Submission from: (NULL) (213.94.201.89) The R GUI close button has a solid circle. Screenshot is here: http://skitch.com/ananelson/kmxj/r-console On OSX this indicates that there are unsaved changes pending. Please see page 201 of the Apple Human Interface Guidelines (version 2008-03-11):

dear all, apologizes for this off topic. I would like to inform you that registration and paper submission for the 28th International Workshop on Statistical Modelling (IWSM) to be held in Palermo (Italy) 8-12 July 2013 is now open at http://iwsm2013.unipa.it Register at http://iwsm2013.unipa.it/?cmd=registration and then submit your abstract. Deadlines for Abstract submission is February 4,

I have two tables: class PgmUpdate < ActiveRecord::Base has_many :pgm_visits, :foreign_key => ''pgm_update_fk'' ... and class PgmVisit < ActiveRecord::Base belongs_to :pgm_update, :foreign_key => ''pgm_update_fk'', :dependent => true ... According to the has_many docs (http://api.rubyonrails.org/classes/

I am trying to create a record with association. Within the create method, I would also like to pre-populate dependent (has_many) records from a template in the database. The child records are <u>mysteriously rolled back </u> if I insert them in a loop. If I try to insert a single child record, it works.I have read the books and tried to google my way out of this but am at a dead

In a belongs_to association, is there a way to tell if the associated object was newly created? Hopefully this will explain my question: A Firm class declares has_many<http://api.rubyonrails.com/classes/ActiveRecord/Associations/ClassMethods.html#M000530>:clients and a client class declares

dear all, This is a probably a silly question. If I type > grep("x",c("a.x" ,"b.x","a.xx"),value=TRUE) [1] "a.x" "b.x" "a.xx" Instead, I would like to obtain only "a.x" "b.x" How is it possible to get this result with grep()? many thanks for your attention, best, vito --

Dear all, there are R packages able to simulate or estimate bilinear model for time series? I know it is an open problem, but do exist something for very simplified bilinear models? Alternatively, what kinfd of non linear time series models are performed in R? If R is not able, could someone suggest me for some commercial softwares to deal with bilinear models? i'm afraid of a negative

Dear all, I have tried to consider a correlation structure in lme (package lme4), but without success. I have used something like: > risul<-lme(y~x+ z , data=mydata, random=~ x | g, correlation = corAR1()) but the result is the same as: > risul<-lme(y~x+ z , data=mydata, random=~ x | g). Can anybody help me? Antonella ************************************************** Prof.

Dear all, Is there *any* reason explaining what I describe below? I have the following line myfun(x) If I type them directly in R (or copy/past), it works.. However if I type in R 2.6.1 > source("code.R") ##code.R includes the above line Error in inherits(x, "data.frame") : object "d" not found namely myfun() does not work correctly. In particular the