inheritance in list items
when accessing the listcustomdetail property the sql is correctly assembled, but when accessing the listdetail it gives sql error. am i mapping wrong or is it an error?

unit testedetailheranca;

interface

uses

generics.collections,

aurelius.mapping.attributes, aurelius.types.proxy

;

type

tdet…
unfortunately that's not how it works. it's db mapping, and we're talking about joined-tables hierarchy. so the "other side" of the association must be in the referenced table (the detail one, not custom detail).
A segmentation fault in this case probably means you accessed one of the arrays out of bounds. Start up a debugger and keep a watch on your indices. hi [@nathan\_lively](/u/nathan_lively) - i’m not as familiar with the limitations of the bubble api, but i think i see two problems that might be causing the error.

the list you’re sending should look like this: ["1:1 matched reference"]. each array value needs to be wrapped in quotes.

you probably also don’t need quo… that error happens when there's no handle to close. i see you call the 'open()' and you're not getting an object reference error before closehandle(). check your memory.pointerwrite() function to make sure it's not doing a closehandle() prematurely. it sounds like you're calling closehandle() twice. In your example, the category data is stored in an attribute, rather than within the node itself.


You therefore need to use the XPath: `/product[1]/categories/category/@path` where the @ shows you want to target an attribute. The clue is `Access denied for user 'homestead'@'localhost'`


Do you have a user called `homestead`? Have you attempted to grant them access to the database?


If you're unsure of the answers to either of those questions, I think you should re-read the documentation. okay, i think i found out what is happening: <https://github.com/drtimothyaldendavis/suitesparse/issues/45> hi paul,

i believe the financial reporting covers in quite a lot of detail exactly what you are looking for.

from what i can tell you aren’t using templates in your tables…

[[image]](https://forum.enterprisedna.co/uploads/db7134/original/2x/5/559a333f85c159c8d9bec9235ca5c45997d08858.png "image")

if you want to get a certain order and custom table then you really need to use the template approach covered in t… hi [@gianna.demetroulakos](/u/gianna.demetroulakos),

as mentioned by [@william.coulson](/u/william.coulson), the object reference not set to an instance of an object normally occurs when a variable is null.

run the code in the debug mode.

when the error occurs, check the variable which has a null value in locals tab.

warm regards,

ranjith u… since the error is on websockets, it is almost certainly a proxy layer somewhere that doesn’t support websockets, which is different on the two clusters (i.e. between you and any jupyterhub’s proxy-public entrypoint, rather than any part of jupyterhub itself or any of jupyterhub’s own configuration)… you’re on the right track.

is the name column of the choices table of the same column type as the 1st place and 2nd place columns?

please post a screenshot of the error message and the complete expression to which it refers.