Fix method resolution ambiguity when passing null to eq/neq methods #1450
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…f columns optionally referencing to the `id` of another table; unify logic of these methods; add respectful test cases
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This PR fixes #1437 by making
fun <T : Comparable<T>, E : EntityID<T>?> ExpressionWithColumnType<E>.eq(t: T?)overload accept only non-nullable arguments. Passingnullto receivers of this type will be resolved to more general overload<T> ExpressionWithColumnType<T>.eq(t: T)having the same logic for processing of this value.Also, this PR fixes the same problem for
neqmethod and unifies their API and implementation.