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28 discussions - 161 posts

  • Can Cayenne work (consistently) with relationships where the underlying foreign key constraint is missing? (e.g. when the fields for foreign key are there and respect the standard naming convention - ...
    Joseph SchmidtJoseph Schmidt
    Mar 27, 2009 at 4:31 pm
    Mar 30, 2009 at 7:19 am
  • Hi! My first contact with an ORM was EOF... an ever since I have felt that nothing compares to it ;-). The thing is, I have had to work with JPA/Hibernate for a few years now... and I feel it has ...
    Francisco PeredoFrancisco Peredo
    Mar 11, 2009 at 8:07 pm
    Mar 12, 2009 at 10:33 pm
  • Hello, I implemented validateForSave(ValidationResult validationResult) in one of my ObjEntities. When a specific condition is not met, a ValidationException is thrown. How can I handle this ...
    Νίκος ΠαράσχουΝίκος Παράσχου
    Mar 10, 2009 at 3:04 pm
    Mar 12, 2009 at 9:42 am
  • Imagine you have Artist and Painting entities. You create a new Paining and attach it to existing Artist, then commit. The Artist object is marked as modified, so LifecycleListeners will fire for it, ...
    Andrey RazumovskyAndrey Razumovsky
    Mar 24, 2009 at 10:17 am
    Mar 24, 2009 at 3:17 pm
  • I am attempting to create the simplest Cayenne-expedient method of doing the following query. (I can easily do this in SQL but am a tad confused with the Cayenne Expression method.) I have an Entity ...
    Joe BaldwinJoe Baldwin
    Mar 14, 2009 at 6:29 pm
    Mar 16, 2009 at 3:01 pm
  • Hi, I'm trying to implement a factory method pattern based on a cayenne data object. Say for example i have a class (cayenne based) called Artist, i want to make a subclass of Artist, say ...
    Mar 2, 2009 at 12:52 am
    Mar 13, 2009 at 2:49 pm
  • Hi, I've read about and understand that my application is having its connection timed out after 8 hours of inactivity using MySql. I've set the timeout to be 120 seconds so I can try and reproduce ...
    Dave MerrinDave Merrin
    Mar 31, 2009 at 10:33 am
    Mar 31, 2009 at 2:11 pm
  • How to model/map files (with their content) e.g. in webapplications? What is the best practice? (1) To put their content as blob fully in the DB plus fields for properties, or (2) to put the metadata ...
    Joseph SchmidtJoseph Schmidt
    Mar 21, 2009 at 7:20 pm
    Mar 22, 2009 at 2:54 am
  • Hi, We have a legacy table that have a meaningful primary key, many code depends on it and it's not possible to alter it. We are building new java applications that need to insert in it. We would ...
    Mar 19, 2009 at 11:11 pm
    Mar 20, 2009 at 3:32 pm
  • Greets! Neat product. I'm having a newb issue which I'm hopeful someone can help with. Here is the relevant layout: I have 2 tables (PARTY and CASE) and a third lookup table which maps the ...
    Mar 17, 2009 at 2:15 pm
    Mar 17, 2009 at 9:19 pm
  • Is it possible for Cayenne(and the Modeler) to map conditional relationships? I have a table, e.g. "tag" that relates to too many other tables, but one row is always related only to one table. This ...
    Joseph SchmidtJoseph Schmidt
    Mar 28, 2009 at 5:28 pm
    Mar 31, 2009 at 2:51 pm
  • The question at hand is: Given an ROP client object retrieved from the database, can I serialize it to disk, later on, de-serialize it to memory, register it to a context and use it as if it came ...
    Zissis TrabarisZissis Trabaris
    Mar 27, 2009 at 1:38 am
    Mar 29, 2009 at 8:18 am
  • Does Cayenne require the use of a reversed relationship always? Of course they're practical, but in many schemes e.g. in the case of the 'user' table, just too many other tables (~2/3 of them) point ...
    Joseph SchmidtJoseph Schmidt
    Mar 28, 2009 at 4:22 pm
    Mar 28, 2009 at 7:01 pm
  • Hi,i'm developing an application that must load a large ammount of data (100.000 records) and stream them out from a servlet. I created a "for" cycle that for every step load 200 record from the ...
    Mar 18, 2009 at 11:15 am
    Mar 18, 2009 at 3:55 pm
  • It might be me not finding this in the documentation but here is the question anyway. Given table A with a toMany relationship to table B, it's obvious that when I get all instances of table B they ...
    Zissis TrabarisZissis Trabaris
    Mar 7, 2009 at 6:47 pm
    Mar 8, 2009 at 10:44 am
  • Hi, I need to do a selection on a table partially based on comparing two elements of that table. Basically a 'total' and a 'current' where total is a changing value and needs to be compared to ...
    John ArmstrongJohn Armstrong
    Mar 26, 2009 at 4:55 pm
    Mar 27, 2009 at 4:48 pm
  • i would like to do the folowing : each table that i will have into my database must have : id create_date create_user_id write_date write_user_id Normally i though to subclass each of my data model ...
    Mar 21, 2009 at 7:23 pm
    Mar 23, 2009 at 8:19 am
  • Hello. I used to be an active cayenne user but I've been away from web-app development for over a year. I'm back into it now and trying out Cayenne 3.0. I tried to add the cayenne source as an ...
    Mar 16, 2009 at 3:38 pm
    Mar 16, 2009 at 6:43 pm
  • Hello Cayenne luminaries-- I've recently started getting deep in Cayenne (running 3.0 M5) and I must say that it's been a pleasure thus far. Not only does the API fit my mode of thinking and design ...
    Dave LamyDave Lamy
    Mar 1, 2009 at 6:39 pm
    Mar 2, 2009 at 5:18 pm
  • I hate to write such a vague message but after googling for a day I don't seem to be getting anywhere debugging an exception I'm getting when I try commit changes to a CayenneDataObject back to the ...
    Paul Logasa Bogen IIPaul Logasa Bogen II
    Mar 4, 2009 at 4:22 pm
    Mar 4, 2009 at 10:43 pm
  • Hey guys-- We have a number of different clients, each of which make use of a common foundation of code. I want each client's codebase to have its own cayenne.xml, but import a common DataMap that ...
    Dave LamyDave Lamy
    Mar 30, 2009 at 9:40 pm
    Mar 31, 2009 at 5:15 am
  • FYI. Andrey already proposed some new projects. Maybe there will be more ideas. Now the question is whether we have anyone to mentor those projects? Andrus Begin forwarded message:
    Andrus AdamchikAndrus Adamchik
    Mar 20, 2009 at 8:50 am
    Mar 21, 2009 at 12:27 am
  • Hello, When I try to commit something and Cayenne cannot communicate with the data node (because internet connection is broken or the DBMS server is down), a CayenneRuntimeException is thrown. A ...
    Νίκος ΠαράσχουΝίκος Παράσχου
    Mar 19, 2009 at 10:57 am
    Mar 19, 2009 at 4:48 pm
  • I have several thousand dollars budgeted to have someone build a new UI for a threat modeling system which will become open source. The idea person would know cayenne, be very skillful at rich-client ...
    Eric LazarusEric Lazarus
    Mar 19, 2009 at 3:20 pm
    Mar 19, 2009 at 3:56 pm
  • it doesn't look like cayenne 2.0.4 will read a decimal database type into a java Float. Is that correct? Originally I had the database type as float and persistence worked fine but then I converted ...
    Chad SmithChad Smith
    Mar 12, 2009 at 3:56 pm
    Mar 12, 2009 at 10:37 pm
  • Hello, I am working through the ROP tutorial with Version 2.0.4 and Hessian 3.0.13. I have set up the web service and the client, and I know my client is connecting because the first connections to ...
    Karen HarperKaren Harper
    Mar 7, 2009 at 11:53 pm
    Mar 8, 2009 at 2:29 pm
  • Hello, Could you please guide me how to code a query like the following in cayenne: SELECT * FROM mytable WHERE id IN (SELECT ids FROM myothertable WHERE something); One option is SQLTemplate. How ...
    Νίκος ΠαράσχουΝίκος Παράσχου
    Mar 4, 2009 at 10:19 am
    Mar 4, 2009 at 10:46 am
  • Hey guys-- I noticed a menu item in the Modeller (using 3.0 M5) called Import DataMap. Not sure, but guessing I could use this.. I have a DataMap that has core data classes that I'd like to copy or ...
    Dave LamyDave Lamy
    Mar 28, 2009 at 2:50 am
    Mar 28, 2009 at 2:50 am
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27 users for March 2009

Andrus Adamchik: 20 posts Andrey Razumovsky: 16 posts Michael Gentry: 15 posts Joseph Schmidt: 14 posts Aristedes Maniatis: 9 posts Joe Baldwin: 9 posts Robert Zeigler: 9 posts Νίκος Παράσχου: 9 posts Hans: 7 posts Francisco Peredo: 7 posts Dave Lamy: 6 posts Mike Kienenberger: 6 posts Zissis Trabaris: 5 posts Dave Merrin: 4 posts Juergen Saar: 4 posts Bryan Lewis: 3 posts Kevin Menard: 3 posts Csergiu77: 2 posts Dan: 2 posts John Armstrong: 2 posts
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