Search Results

Search found 6357 results on 255 pages for 'generic relations'.

facebook twitter digg google delicious technorati stumbleupon myspace wordpress linkedin gmail igoogle windows live tumblr viadeo yahoo buzz yahoo mail yahoo bookmarks favorites email print

Page 77/255 | < Previous Page | 73 74 75 76 77 78 79 80 81 82 83 84  | Next Page >

  • Subsonic 2.2 and SQL CE

    - by Giuseppe
    Hi, anybody use Subsonic with SQL Server CE 3.5 ? I try but get an error with Substage 2.2, error talking about PK_TABLE. My tables have primary keys and relations. Can someone help me ? By, Giuseppe.

    Read the article

  • Using a join model to relate a model to itself

    - by Gabe Hollombe
    I have two models: User MentoringRelationship MentoringRelationship is a join model that has a mentor_id column and a mentee_id column (both of these reference user_ids from the users table). How can I specify a relation called 'mentees' on the User class that will return all of the users mentored by this user, using the MentoringRelationships join table? What relations do we need to declare in the User model and in the MentoringRelationship model?

    Read the article

  • database is normalized but the following is a problem please help

    - by user287745
    but the prob is there are relations ships which are so huge that after normalizing they have like a 20 primary keys( composite keys) which are really foreign keys but have to be declared as primary keys to identify the relationship uniquely. so please help? is it correct and i apologize to the expert community for not accepting answers, i was not aware that accepting is possible, the TICK MARK is that visible :-)

    Read the article

  • Generating db schema from c# class

    - by Niran
    Hi, Is there any other method than nHibernate by wich we can generate db schema from class definition? My classes arn't that complex etc (few one-to-many relations). However I would like to just be able to save my objects in db and recreate schema if needed. I am stuck with .NET 2.0. I am not that particular about performance for this project, I am just lazy to create tables and write save/load code and deel with nHibernate xml. Thanks

    Read the article

  • Hbase and 1- Many Relation

    - by Shuja
    Hi All I have one question which can be best described by the following scenario. Suppose I have three tables BaseCategory,Category and products. If i am thinking in terms of RDBMS then the relationship amoung these tables are 1- One BaseCategory has Many categories 2- One Category has Many Products. Now i am thinking to convert it into HBase. can anybody help me how to map these relations into HBase?

    Read the article

  • Scaffold is ignoring class file in CakePHP

    - by JoseMarmolejos
    Hi, when using scaffolding on a controller the views render fine and the app even attempts to insert the data; the problem is that the scaffold is completely ignoring the relations I'm defining in my model class, in fact it's ignoring the class entirely as I can delete the file and the controller still scaffolds and render the crud from the table. Has this ever happened to you?

    Read the article

  • How to limit manytomanyfields on a model ?

    - by Tom
    I would like to check that I get not more than 3 relations set on a manytomanyfield. I tried on the clean method to do this : if self.tags.count()>3: raise ValidationError(_(u'You cannot add more than 3 tags')) But self.tags returns not the current updates... only saved objects. Do you have an idea to access to them ? Thanks

    Read the article

  • need a project design tool

    - by santosh
    I am looking for simple and easy to use tools through which I can get project's visual picture of folder/file tree stucture , its classes, functions and objects, relations between classes and files.

    Read the article

  • Methodology for a Rails app

    - by Aaron Vegh
    I'm undertaking a rather large conversion from a legacy database-driven Windows app to a Rails app. Because of the large number of forms and database tables involved, I want to make sure I've got the right methodology before getting too far. My chief concern is minimizing the amount of code I have to write. There are many models that interact together, and I want to make sure I'm using them correctly. Here's a simplified set of models: class Patient < ActiveRecord::Base has_many :PatientAddresses has_many :PatientFileStatuses end class PatientAddress < ActiveRecord::Base belongs_to :Patient end class PatientFileStatus < ActiveRecord::Base belongs_to :Patient end The controller determines if there's a Patient selected; everything else is based on that. In the view, I will be needing data from each of these models. But it seems like I have to write an instance variable in my controller for every attribute that I want to use. So I start writing code like this: @patient = Patient.find(session[:patient]) @patient_addresses = @patient.PatientAddresses @patient_file_statuses = @patient.PatientFileStatuses @enrollment_received_when = @patient_file_statuses[0].EnrollmentReceivedWhen @consent_received = @patient_file_statuses[0].ConsentReceived @consent_received_when = @patient_file_statuses[0].ConsentReceivedWhen The first three lines grab the Patient model and its relations. The next three lines are examples of my providing values to the view from one of those relations. The view has a combination of text fields and select fields to show the data above. For example: <%= select("patientfilestatus", "ConsentReceived", {"val1"="val1", "val2"="val2", "Written"="Written"}, :include_blank=true )% <%= calendar_date_select_tag "patient_file_statuses[EnrollmentReceivedWhen]", @enrollment_complete_when, :popup=:force % (BTW, the select tag isn't really working; I think I have to use collection_select?) My questions are: Do I have to manually declare the value of every instance variable in the controller, or can/should I do it within the view? What is the proper technique for displaying a select tag for data that's not the primary model? When I go to save changes to this form, will I have to manually pick out the attributes for each model and save them individually? Or is there a way to name the fields such that ActiveRecord does the right thing? Thanks in advance, Aaron.

    Read the article

  • DataContext to DB

    - by JD
    Hi all, I have designed my DB using the ORM in VS 2008. What is the best way to export this to an SQL server so it will create the tables and relations on SQL Server? Thanks, JD

    Read the article

  • Is there an ActiveRecord equivalent to using a nested subquery i.e. ... where NOT IN(select...) ?

    - by Snorkpete
    I have 3 models: Category, Account, and SubAccount The relations are: Accounts has_many :sub_accounts Categories has_many :sub_accounts I wanted to get a list of all Categories that are not used by a given account. My method in the Category model currently looks like: class Category < ActiveRecord::Base def self.not_used_by(account) Category.find_by_sql("select * from categories where id not in(select category_id from sub_accounts where account_id = #{account.id})") end end My question is, is there a cleaner alternative than using SQL? NB. I am currently using Rails 3(beta)

    Read the article

  • Return dataset in dataflow

    - by praveen
    Hi All, Could I get ideas on retrieving the dataset using lookup method. Basically, my scenario as I have source data needs to lookup for other source table and on matching column from source I need to get all the records from other source data. its a one to many relations. I tried Lookup but gives only one record on matching condition, OLE DB command don't retrieve any data as it will do only Insert/Update operations. Thanks prav

    Read the article

  • How to delete many-to-many records in Doctrine?

    - by terrani
    Hi All, I am trying to delete records in many to many using Doctrine. I used code on http://www.doctrine-project.org/documentation/manual/1_2/ru/working-with-models#many-to-many-relations:deleting-a-link when I do the first method, it just deletes UserGroup record ONLY. How do I delete User, Group, and UserGroup records at once? The second and thrid methods do not work as well.

    Read the article

  • Php framework for fast developing

    - by nucleartux
    Please advise a php framework for fast developing and for don't digress to write often using code(auth, db/orm,etc..). Requrements: Active community Easy to use simple many to many and many to one relations auth. mechanism RoR like Please sorry for english.

    Read the article

  • django join querysets from multiple tables

    - by dana
    if i have queries on multiple tables like: d = Relations.objects.filter(follow = request.user).filter(date_follow__lt = last_checked) r = Reply.objects.filter(reply_to = request.user).filter(date_reply__lt = last_checked) article = New.objects.filter(created_by = request.user) vote = Vote.objects.filter(voted = article).filter(date__lt = last_checked) and i want to display the results from all of them ordered by date (i mean not listing all the replies, then all the votes, etc ). Somehow, i want to 'join all these results', in a single queryset. Is there possible?

    Read the article

  • sql create view in one to many relation

    - by new to sql
    i want to create a view in a one-to-many relatiom. here is my relations: (a -* b) and (a -* c). i want to create a view to have this data : a1 - (all b's related to a1 + all c's relted to a1) i don't wnat sth like (a1 ,b1,c1 - a1,b1,c2 ,...) how can i create this view ?

    Read the article

  • Database design -- does it respect 3rd NF?

    - by Flavius
    Hi I have the following relations (tables) in a relational model Person person_id, first_name, last_name, address Student person_id, matr_nr Teacher person_id, salary Lecture lecture_id, lect_name, lect_description Attendees lecture_id, person_id, date I'm wondering about the functional dependencies of Student and Teacher. Do these tables respect the 3rd normal form? Which should be the primary keys of these tables?

    Read the article

  • best way to create tables with Doctrine?

    - by ajsie
    assume that i start coding an application from scratch, is the best way to create tables when using Doctrine, to manually create tables in mysql and then generate models from the tables, or is it the other way around, that is to create the models in php and then generate tables from models? and if i already have a database, will the models created be optimal? cause i have heard some say that its best to create the database from scratch when using ORM, so that the relations are optimized for OOD. share your thoughts!

    Read the article

facebook twitter digg google delicious technorati stumbleupon myspace wordpress linkedin gmail igoogle windows live tumblr viadeo yahoo buzz yahoo mail yahoo bookmarks favorites email print

< Previous Page | 73 74 75 76 77 78 79 80 81 82 83 84  | Next Page >