Databases
StackOverflow2013
Postsdbo
PO
 

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    1. This table or related slice is empty.
    1. POCatch Exception high in the call stack- when dealing with n tiers?
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    1. USduffymo
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    1. COI assume you mean frontend layer when you say services layer ? Wont it clutter the top end of the line layer with code that may require information from layers below it to handle ? eg: if I have a want to for some reason make the data access call 3 times before giving up, and that state is stored in the layer that just passed it up, how will the frontend layer access it ? wont it make the top layer bulky ? do you have any example code that follows this pattern ?
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      1. UStreefrog
    2. CONo, "service" is not "front end", because that phrase means presentation or view to me. By definition, if it bubbles up, it means that layers below cannot handle it. "Handle" doesn't mean log the stack trace - it means doing something about a rare or exceptional situation. What state do you mean? If you get a SQL Exception, what else do you need besides the SQL error code and such? Add it to a custom exception if you must. I don't think it makes anything bulky. No sample code.
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      1. USduffymo
    3. COlets not name the layers its confusing. I said "frontend domain and db layers" and you replied back with "services" I did not know what in my list you were referring to. So I am going to say Layer1 - layer n(inner most) In the example I mentioned where handling means retrying 3 times, I need to store the number of times so far somewhere- it should be closest to where exceptioin occured, preferably in the layer n-1 above it. (contd... in next comment)
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      1. UStreefrog
 

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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.

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