Package io.quarkus.hibernate.panache.reactive

Interface PanacheReactiveQuery<Entity>

All Superinterfaces:

PanacheQuery<io.smallrye.mutiny.Uni<Entity>,io.smallrye.mutiny.Uni<List<Entity>>,io.smallrye.mutiny.Uni<Boolean>,io.smallrye.mutiny.Uni<Long>>

All Known Implementing Classes:

PanacheManagedReactiveQueryImpl, PanacheStatelessReactiveQueryImpl

public interface PanacheReactiveQuery<Entity>
extends PanacheQuery<io.smallrye.mutiny.Uni<Entity>,io.smallrye.mutiny.Uni<List<Entity>>,io.smallrye.mutiny.Uni<Boolean>,io.smallrye.mutiny.Uni<Long>>

Method Summary

Modifier and Type	Method	Description
<T> PanacheQuery<io.smallrye.mutiny.Uni<T>,io.smallrye.mutiny.Uni<List<T>>,Boolean,Long>	project(Class<T> type)	Defines a projection class.

Methods inherited from interface io.quarkus.hibernate.panache.PanacheQuery

count, filter, filter, firstPage, firstResult, hasNextPage, hasPreviousPage, lastPage, list, nextPage, page, page, page, pageCount, previousPage, range, singleResult, withHint, withLock

Method Details

project

<T>
PanacheQuery<io.smallrye.mutiny.Uni<T>,io.smallrye.mutiny.Uni<List<T>>,Boolean,Long> project(Class<T> type)

Defines a projection class. This will transform the returned values into instances of the given type using the following mapping rules:

• If your query already selects some specific columns (starts with select distinct? a, b, c…) then we transform it into a query of the form: select distinct? new ProjectionClass(a, b, c)…. There must be a matching constructor that accepts the selected column types, in the right order.
• If your query does not select any specific column (starts with from…) then we transform it into a query of the form: select new ProjectionClass(a, b, c…) from… where we fetch the list of selected columns from your projection class' single constructor, using its parameter names (or their ProjectedFieldName annotations), in the same order as the constructor.
• If this is already a project query of the form select distinct? new…, we throw a PanacheQueryException

Parameters:

type - the projected class type

Returns:

a new query with the same state as the previous one (params, page, range, lockMode, hints, ...) but a projected result of the type type

Throws:

io.quarkus.panache.common.exception.PanacheQueryException - if this represents an already-projected query