Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>Regarding 1: As far as I can see it, it is not the IQuerable itself that is the problem being returned from a repository. The point of a repository is that it should look like an object that contains all your data. So you can ask the repository for the data. If you have more than one object needing the same data, the job of the repository is to cache the data, so the two clients of your repository will get the same instances - so if the one client changes a property, the other will see that, becuase they are pointing to the same instance.</p> <p>If the repository was actually the Linq-provider itself, then that would fit right in. But mostly people just let the Linq-to-sql provider's IQuerable pass right through, which in effect bypasses the responsibility of the repository. So the repository isn't a repository at all, at least according to my understanding and usage of the pattern.</p> <p>Regarding 2: Naturally it is more performance-effective to just return a single value from the database than the entire record. But using a repository pattern, you wouldn't be returning records at all, you would be returning business objects. So the application logic should not concern itself with fields, but with domain objects. </p> <p>But how more effective is it to return a single value compared to a complete domain object? You will probably not be able to measure the difference if your database schema is reasonably well defined.</p> <p>It is a lot more important to have clean, easy-to-understand code - instead of microscopic performance optimizations up front. </p>
    singulars
    1. This table or related slice is empty.
    1. PORepository Pattern Best Practice
      singulars
      1. PTQuestion
    1. PTAnswer
    1. This table or related slice is empty.
    1. USPete
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload