Flutter Moor join and where - flutter

Question

My Dependencies for moor:
moor_flutter: ^2.1.1
moor_ffi: ^0.4.0
I have the tables:
netPoint = Information about the netPoint
netPointNetPoint = linking of netpoints
I want all netPoints that match the "PARENTS_ID" s. below.
My problem is that I cannot access netPointNetPoint in the Where condition.
select(netPoint)
..where((t) => t.TYPE.equals(type))
..join(
[
innerJoin(netPointNetPoint, netPointNetPoint.CHILDREN_ID.equalsExp(netPoint.ID)),
innerJoin(netPointNetPoint, netPointNetPoint.PARENTS_ID.equals(parentId))
]
)
).get();
Unfortunately the help page https://moor.simonbinder.eu/docs/advanced-features/joins/ did not help me.

Answer 1

Well, the questions is quite old, but I've faced the same problem and just in case some one will have the same problem. I guess you had to change the expressions with something like this:
select(netPoint)
..where((t) => t.TYPE.equals(type))
..where((t) => netPointNetPoint.PARENTS_ID.equals(parentId))
..join(
[
innerJoin(netPointNetPoint, netPointNetPoint.CHILDREN_ID.equalsExp(netPoint.ID))
]
)).get();
The join's result will have all the columns you need, hence you just need to check that the column in the row has needed value. E.g. netPointNetPoint.PARENTS_ID.equals(parentId).

Answer 2

I guess, you are accessing the netPointNetPoint table outside the extended Database class. That will fail as all tables are accessed inside the database.
and I guess, you initialized that database in such a way it is accessible by other files.
if you initialized the database like this :
final AppDatabase db = AppDatabase();
then, to reference your netPointNetPoint table, just do it from the Database object, like this :
db.netPointNetPoint
I think, this will help you