objectbox / objectbox/objectbox-java
ability to link queries with OR not just AND
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- Dominant language
- Java
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Description
Use case
I have a DB where EntryA has one-to-many relationships with EntryB.
I encountered a case where I have a text field, and I want to query the EntryA database to retrieve all entries filtered by that text field's value.
So for value 'aa', I want to get all the EntryA values where EntryA.name contains 'aa' OR(not AND, which is the default) if EntityA.items contain items with name containing 'aa'
Code example
final builder =
store.box<EntryA>().query(EntryA_.name.contains('aa'))
..link(EntryA_.owner, Owner_.id.equals(123))
..backlink(EntryB_.parent, EntryB_.name.contains('bb'));
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start from the query entry point store.box<EntryA>().query(...) and inspect how the shown link and backlink constraints are combined. Define how an OR between EntryA.name.contains('aa') and matching related items should work, then verify the behavior with a focused query example. Done means queries can express the requested OR relationship instead of applying only AND semantics.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- dart
- Domain
- database
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100