There is a compilation error with Entity.id.isEqual(to:id)

[welkinbai]

Is there an existing issue?

• I have searched existing issues

Build info

• ObjectBox version: [4.1.0]
• OS: IOS 17
• Device/chipset: iPhone 15

Steps to reproduce

1. my class:

// objectbox: entity
class OneEntity :{
    var id: Id = 0
    
    var text: String?
    init(){}
  
}

query code:

func query(id: Id) -> [OneEntity] {
        do {
            let query: Query<OneEntity>?

            query = try entityDataBox?.query {OneEntity.id.isEqual(to: id) }
                .build()

            
            if let result = try query?.find(limit: 15) {
                return result
            }
            
            return []
        } catch {
            print("query fail, err:\(error)")
            return []
        }
    }

I encountered a compilation error at OneEntity.id.isEqual(to: id) here:
Ambiguous use of 'isEqual(to:)'

Expected behavior

I expect OneEntity.id.isEqual(to: id) should work

Actual behavior

Compilation error

[welkinbai]

I noticed that isEqual has two definitions:

extension Property where V : ObjectBox.IdBase {

    /// Equivalent to the == operator in query blocks.
    public func isEqual(to value: ObjectBox.Id) -> ObjectBox.PropertyQueryCondition<ObjectBox.Property<E, V, R>.EntityType, ObjectBox.Id>
}

extension Property where V : FixedWidthInteger {

    /// Equivalent to the == operator in query blocks.
    public func isEqual(to value: ObjectBox.Property<E, V, R>.ValueType) -> ObjectBox.PropertyQueryCondition<ObjectBox.Property<E, V, R>.EntityType, ObjectBox.Property<E, V, R>.ValueType>
}

I think this might be the cause of the problem, but I don't know how to solve it.

[greenrobot-team]

Thank you for reporting!

I also have not found a workaround for this when this is one of many query conditions.

However, if the only query condition is an isEqual on the ID, like the above example, you can instead write code to just get the object from its Box using the ID: entityDataBox.get(id)

Internal issue for this is objectbox-swift#314

[chrisrohrer]

this seems to work for me as part of a longer query:

Mitarbeiter.team.isEqual(to: Id(team.id.value))

[greenrobot-team]

@chrisrohrer Thanks for reporting. Maybe the Swift compiler got smarter? Will have to verify.