Immutable collection-like property

Reports usages of immutable collections in JPA entities.

Detects properties annotated with @OneToMany or @ManyToMany with immutable collection types (List, Set, Map). Suggests using mutable collection types (MutableList, MutableSet, MutableMap) instead, to ensure Hibernate compatibility.

Embed code snippets:

@Entity
open class User(
  @Id
  val id: Long = 0L,
  @OneToMany
  val orders: List = listOf(),
)

After applying the quickfix:

@Entity
open class User(
  @Id
  val id: Long = 0L,
  @OneToMany
  val orders: MutableList = mutableListOf(),
)

Locating this inspection

By ID

Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

ImmutableCollectionLikePropertyInspection

Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | JPA | Kotlin

Inspection ID: ImmutableCollectionLikePropertyInspection

Suppressing Inspection

You can suppress this inspection by placing the following comment marker before the code fragment where you no longer want messages from this inspection to appear:

//noinspection ImmutableCollectionLikePropertyInspection

More detailed instructions as well as other ways and options that you have can be found in the product documentation:

IntelliJ IDEA 2025.3

Inspection Details
By default bundled with:	IntelliJ IDEA 2025.3, Qodana for JVM 2025.3,

Last modified: 03 December 2025