similar to: Problem with has_many

I am trying to create a messaging system for my users but I''m having a hard time designing my db. This is what i have in mind, but I am not sure if its the best approach. user has_one inbox user has_one outbox inbox has_many messages outbox has_many messages inbox table user_id outbox table user_id messages table box_id (refers to either inbox or outbox - how?) from_id to_id

I have a table called ''users''. I have a second table called ''comments''. The comments table is in need of _two_ columns that both reference different user ids within the ''users'' table (one column for the user id that originated the post, another column for the user id for which the message is intended for. Obviously I can''t create

Hi All, I''d like to integrate a simple user-oriented messaging system into my app. I have a Message model, with :from_user_id, and :to_user_id (for the user that sent and the user that recieved the message). Obivously, (User) has_many :messages will fetch the messages that a certain user has created, but not the ones that they have been sent. Currently, I have this: has_many :messages,

I have a vector like this: h <- c(4, 6, NA, 12) and I create the secound logical vector like this: g <- c(TRUE, TRUE, FALSE, TRUE) And my problem is that I would like to get a new "m" vector as a rasult "h" and "g"( as dot-matrix printer) but with missed "NA" value, for example: m = (4,6,12) Do you have any idea? -- View this message in

Hi, My english isn't brilliant and my problem is very difficult to describe but I try ;) My first question is: May I write loop "for" like this or similar - for (i in sth : sth[length(sth)], k in sth_else : length(sth_else) ) - I'd like to have two independent conditions in the same loop "for". My secound question depend on program below. I'd like to write every

Hi Everybody, I'm mount two failover servers which use Postfix and Dovecot but the hostname of the machines r diferent: first node # uname -n # mail secound node #uname -n #mail2 So far so good, the real problem is that the e-mail file name on server is like this: 1232449377.P31789Q0M963611.mail2 and when I using the server called mail the file stay like this:

Hi, I am working on a scheduling app and I have a perpelextion (new word). I am wondering if the problem is my data model I have Users. Users can create Events. Users can be invited to Events created by other Users. So... user.rb class User < ActiveRecord::Base has_many :invitations # invitations to other users'' events has_many :events, :through => :invitations # all events

Hi, I have to install CentOS on a spare partition of a laptop with Windows pre installed. Is there anything I have to watch out for? Couldn't find anything in the wiki or does the installer handle this well without me doing some magic, or so? TIA, Frank.

Hi all, I have the following inside of an AR class definition: relationships=ActiveRecord::Base.connection.select_all(my_relationships_sql) relationships.each do |relationship| has_many RelatedItems, :class_name => relationship[''RelatedClass''], :foreign_key => relationship[''ForeignKey''] end This kind of works, but how can I assign the name of the

Hello all. I am trying to create a self-referential has_many :through. I used the following site as a guide http://blog.hasmanythrough.com/articles/2006/04/21/self-referential-through but it still doesn''t appear to be working. I have two models. Person and Relationship. A person has many contacts (Which is another person) through relationships class Person < ActiveRecord::Base

Josh Susser tells in his blog that the opposite direction of polymorphic will get into trouble together with has_many through. This is the url: http://blog.hasmanythrough.com/articles/2006/04/03/polymorphic-through I do that according to Josh Susser''s procedure: class Tagging < ActiveRecord::Base belongs_to :tag belongs_to :taggable, :polymorphic => true belongs_to

I just took my HABTM and turned it into a :through since my join table has another "non-joiny" attribute. I went from this: has_many_and_belongs_to :jobs, :join_table => ''tablename'', :foreign_key => ''x'', :association_foreign_key => ''y'' to this: has_many :jobs, :through =>

I have two classes: a Widget and a User. The User has an id that is referenced in two places on the Widget: owner_id and operator_id. How should I structure that reference for has_many? Thanks folks - I appreciate any help on this. --David --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails:

I have the following model structure setup. class User < ActiveRecord::Base end class Parent < User has_many :relationships has_many :children, :class_name => "Student", :through => :relationships, :conditions => "related_as = ''parent''" end class Student < User has_many :relationships

I know this has been rehashed many times, but I don''t get it. I can''t find it documented to were I understand all the parts. I can make this work using Rails database design conventions, but in this case I am not able to do that. I find examples, but the ones I find do not follow the conventions. They also do not give enough information to understand what is going on. In

Hi, how can a specific device driver in CentOS 7 be blacklisted, so that it doesn't load at boot time? We have Infiniband adapters which are not completely supported by CentOS and we want to silence the error messages for the time being. I tried with the files /etc/modprobe.d/blacklist /etc/modprobe.d/blacklist.conf and with entries mlx5_core mlx5_ib blacklist

Hi, since I updated my workstation from CentOS 7.4 to 7.5, Firefox and Thunderbird (both 52.8.0, from CentOS repos) regularly freeze (or crash) and cannot be restarted afterwards. Trying to start them results in a "Bus error (core dumped)" (Firefox) and "Killed" (Thunderbird). The system log then shows: kernel: NFS: nfs4_reclaim_open_state: Lock reclaim failed!

Having a devil of a time finding records in a self-referencing has_many table relationship. Everything is working find looking at the has_many and the belongs_to relationship. But, when I try to find all "orphans", records that are neither a parent nor a child, I can not find a query that work in ActiveRecord. This query works in MySQL: SELECT * FROM templates LEFT JOIN templates

I have a problem that surfaced in my attempt to upgrade my application to Rails 1.1. We have a STI model on the "belongs_to" side of a has_many/belongs_to relationship. All my unit tests for this model pass, and the relationships all seem to work fine. But in my functional tests, I''m getting errors. I''ve traced it back into the call to the has_many

Hi, this puzzles me: On one of our developer workstations, all ports with the exception of SSH are closed: $ firewall-cmd --list-all public (active) target: default icmp-block-inversion: no interfaces: eno1 sources: services: ssh dhcpv6-client ports: 22/tcp protocols: masquerade: no forward-ports: source-ports: icmp-blocks: rich rules: $ but still port