--- title: entities.messageRelation description: Read message relation records with the messageRelation repository, and change them with the message relation mutations. Same records as the REST MessageRelations entity. canonical: https://developers.coevera.com/reference/graphql/message-relation/ section: graphql verification: schema generatedFrom: schema f155746 (2026-10-20) publisher: Coevera --- # entities.messageRelation Read message relation records with the messageRelation repository, and change them with the message relation mutations. Same records as the REST MessageRelations entity. REST: [MessageRelations](https://developers.coevera.com/reference/rest/message-relations.md). ## Queries - `getById(entityId: ID!): MessageRelationEntity` Returns the record with the given id, or null when there is none. Deleted records are returned as well. - `getByIds(entityIds: [ID!]!): [MessageRelationEntity!]!` Returns the records with the given ids; ids without a record are left out. Deleted records are returned as well. - `getAll(limit: Int, offset: Int, filter: MessageRelationFilterInput, orderBy: [MessageRelationOrderByInput!], includeDeleted: Boolean): [MessageRelationEntity!]!` Returns the records that match the filter, paged with limit and offset. - `getByCriteria(filter: MessageRelationFilterInput, orderBy: [MessageRelationOrderByInput!], includeDeleted: Boolean, before: String, after: String, first: Int, last: Int): MessageRelationEntityConnection` Returns the records that match the filter as a cursor-paginated connection. - `getChangedFieldsSinceRevision(id: UUID!, revision: Int!): [UUID!]!` Returns the ids of the fields of a record that changed after the given revision. Returns an empty list for entities without change tracking. ## Mutations - `createMessageRelation(input: CreateMessageRelationInput!, validationLevel: [ValidationLevel!]): CreateMessageRelationPayload` Create one record. - `updateMessageRelation(input: UpdateMessageRelationInput!, validationLevel: [ValidationLevel!], sessionIdToUpdate: String): UpdateMessageRelationPayload` Update fields. - `bulkUpdateMessageRelation(input: [CreateOrUpdateMessageRelationInput!]!, deleteInput: [DeleteMessageRelationInput!], validationLevel: [ValidationLevel!], rollbackMethod: RollbackMethod, match: MatchingInput): BulkUpdateMessageRelationPayload` Create or update many; per-item results. - `deleteMessageRelation(input: DeleteMessageRelationInput!): DeleteMessageRelationPayload` Soft-delete. ## Types ### MessageRelationEntity (object) Link between a message (email or memo) and a record such as an account, contact, lead or opportunity. - `isDeleteProtected: Boolean!` True when the record is protected against deletion because it must always exist in the space. Deleting a record that is not protected can still fail on other checks. Read-only. - `id: ID!` Unique identifier of entity. - `isDeleted: Boolean` Specifies if the entity is considered deleted. - `modified: DateTime` Last modification time. - `created: DateTime` Creation time. - `account: AccountEntity` Account the message is linked to, or empty when not linked to an account. - `contact: ContactEntity` Contact the message is linked to, or empty when not linked to a contact. - `customEntity: CustomEntityEntity` Custom entity record the message is linked to, or empty when not linked. - `lead: LeadEntity` Lead the message is linked to. Set when leadOpptyId resolves to a Lead; otherwise empty. - `oppty: OpportunityEntity` Opportunity the message is linked to. Set when leadOpptyId resolves to an Opportunity; otherwise empty. - `email: EmailEntity` Email side of the link. Set when messageId resolves to an Email; otherwise empty. - `memo: MemoEntity` Memo side of the link. Set when messageId resolves to a Memo; otherwise empty. - `project: ProjectEntity` Project the message is linked to, or empty when not linked. - `quote: QuoteEntity` Quote the message is linked to, or empty when not linked. - `accountId: ID` Id of the linked account. - `contactId: ID` Id of the linked contact. - `customEntityId: ID` Id of the linked custom entity record. - `leadOpptyId: ID` Id of the lead or opportunity the message is linked to, or empty when not linked. - `messageId: ID!` Id of the email or memo on this link. - `projectId: ID` Id of the linked project. - `quoteId: ID` Id of the linked quote. - `revision: Int` Revision when entity was lastly changed. - `instancePermissions: [EntityPermsEnum!]! (1 args)` Permissions the current user has on this record, out of the requested ones. ### MessageRelationEntityConnection (object) Paginated list of MessageRelation records. - `pageInfo: PageInfo!` Pagination data for this connection. - `edges: [MessageRelationEntityEdge]!` Contains the nodes in this connection. - `totalCount: Int` Total number of items in the connection. ### MessageRelationEntityEdge (object) A Relay edge containing a `MessageRelationEntity` and its cursor. - `node: MessageRelationEntity` The item at the end of the edge - `cursor: String!` A cursor for use in pagination ### MessageRelationFilterInput (input) Filter conditions for MessageRelation records. Conditions on different fields are combined with AND; use OR, AND and NOT for other combinations. - `OR: [MessageRelationFilterInput!]` Matches records that meet at least one of the listed filters. - `AND: [MessageRelationFilterInput!]` Matches records that meet all of the listed filters. - `NOT: MessageRelationFilterInput` Matches records that do not meet this filter. - `globalSearchQuery: String` Search term matched against the fields that the global search covers for this entity. - `id: EntityFilterStringField` Unique identifier of entity. - `isDeleted: Boolean` Specifies if the entity is considered deleted. - `modified: EntityFilterDateTimeField` Last modification time. - `created: EntityFilterDateTimeField` Creation time. - `accountId: EntityFilterStringField` Id of the linked account. - `contactId: EntityFilterStringField` Id of the linked contact. - `customEntityId: EntityFilterStringField` Id of the linked custom entity record. - `leadOpptyId: EntityFilterStringField` Id of the lead or opportunity the message is linked to, or empty when not linked. - `messageId: EntityFilterStringField` Id of the email or memo on this link. - `projectId: EntityFilterStringField` Id of the linked project. - `quoteId: EntityFilterStringField` Id of the linked quote. - `revision: EntityFilterNumberField` Revision when entity was lastly changed. - `account: AccountFilterInput` Account the message is linked to, or empty when not linked to an account. Matches records where a related record meets these conditions. - `contact: ContactFilterInput` Contact the message is linked to, or empty when not linked to a contact. Matches records where a related record meets these conditions. - `customEntity: CustomEntityFilterInput` Custom entity record the message is linked to, or empty when not linked. Matches records where a related record meets these conditions. - `lead: LeadFilterInput` Lead the message is linked to. Set when leadOpptyId resolves to a Lead; otherwise empty. Matches records where a related record meets these conditions. - `oppty: OpportunityFilterInput` Opportunity the message is linked to. Set when leadOpptyId resolves to an Opportunity; otherwise empty. Matches records where a related record meets these conditions. - `email: EmailFilterInput` Email side of the link. Set when messageId resolves to an Email; otherwise empty. Matches records where a related record meets these conditions. - `memo: MemoFilterInput` Memo side of the link. Set when messageId resolves to a Memo; otherwise empty. Matches records where a related record meets these conditions. - `project: ProjectFilterInput` Project the message is linked to, or empty when not linked. Matches records where a related record meets these conditions. - `quote: QuoteFilterInput` Quote the message is linked to, or empty when not linked. Matches records where a related record meets these conditions. ### MessageRelationOrderByInput (input) Sorting of MessageRelation records. Set exactly one field in each item; list several items to sort by more fields, in order of priority. - `id: OrderByEnum` Unique identifier of entity. - `isDeleted: OrderByEnum` Specifies if the entity is considered deleted. - `modified: OrderByEnum` Last modification time. - `created: OrderByEnum` Creation time. - `account: [AccountOrderByNestedInput!]` Account the message is linked to, or empty when not linked to an account. Sorts by fields of the related record, listed in order of priority. - `contact: [ContactOrderByNestedInput!]` Contact the message is linked to, or empty when not linked to a contact. Sorts by fields of the related record, listed in order of priority. - `customEntity: [CustomEntityOrderByNestedInput!]` Custom entity record the message is linked to, or empty when not linked. Sorts by fields of the related record, listed in order of priority. - `lead: [LeadOrderByNestedInput!]` Lead the message is linked to. Set when leadOpptyId resolves to a Lead; otherwise empty. Sorts by fields of the related record, listed in order of priority. - `oppty: [OpportunityOrderByNestedInput!]` Opportunity the message is linked to. Set when leadOpptyId resolves to an Opportunity; otherwise empty. Sorts by fields of the related record, listed in order of priority. - `email: [EmailOrderByNestedInput!]` Email side of the link. Set when messageId resolves to an Email; otherwise empty. Sorts by fields of the related record, listed in order of priority. - `memo: [MemoOrderByNestedInput!]` Memo side of the link. Set when messageId resolves to a Memo; otherwise empty. Sorts by fields of the related record, listed in order of priority. - `project: [ProjectOrderByNestedInput!]` Project the message is linked to, or empty when not linked. Sorts by fields of the related record, listed in order of priority. - `quote: [QuoteOrderByNestedInput!]` Quote the message is linked to, or empty when not linked. Sorts by fields of the related record, listed in order of priority. - `accountId: OrderByEnum` Id of the linked account. - `contactId: OrderByEnum` Id of the linked contact. - `customEntityId: OrderByEnum` Id of the linked custom entity record. - `leadOpptyId: OrderByEnum` Id of the lead or opportunity the message is linked to, or empty when not linked. - `messageId: OrderByEnum` Id of the email or memo on this link. - `projectId: OrderByEnum` Id of the linked project. - `quoteId: OrderByEnum` Id of the linked quote. - `revision: OrderByEnum` Revision when entity was lastly changed. ### CreateMessageRelationInput (input) Field values of a new MessageRelation record. - `clientMutationId: String` Optional client-supplied identifier passed on a mutation input and echoed back unchanged on its payload, so a client can correlate the response with its request (Relay convention). - `modified: DateTime` Last modification time. - `created: DateTime` Creation time. - `accountId: ID` Id of the linked account. - `contactId: ID` Id of the linked contact. - `customEntityId: ID` Id of the linked custom entity record. - `leadOpptyId: ID` Id of the lead or opportunity the message is linked to, or empty when not linked. - `messageId: ID!` Id of the email or memo on this link. - `projectId: ID` Id of the linked project. - `quoteId: ID` Id of the linked quote. - `revision: Int` Revision when entity was lastly changed. ### CreateOrUpdateMessageRelationInput (input) Field values of a MessageRelation record to create, or to update when its id is set. - `clientMutationId: String` Optional client-supplied identifier passed on a mutation input and echoed back unchanged on its payload, so a client can correlate the response with its request (Relay convention). - `id: ID` Unique identifier of entity. - `modified: DateTime` Last modification time. - `created: DateTime` Creation time. - `accountId: ID` Id of the linked account. - `contactId: ID` Id of the linked contact. - `customEntityId: ID` Id of the linked custom entity record. - `leadOpptyId: ID` Id of the lead or opportunity the message is linked to, or empty when not linked. - `messageId: ID` Id of the email or memo on this link. - `projectId: ID` Id of the linked project. - `quoteId: ID` Id of the linked quote. - `revision: Int` Revision when entity was lastly changed. ### DeleteMessageRelationInput (input) Id of the MessageRelation record to delete. - `clientMutationId: String` Optional client-supplied identifier passed on a mutation input and echoed back unchanged on its payload, so a client can correlate the response with its request (Relay convention). - `id: ID!` Unique identifier of entity. - `leadOpptyId: ID` Id of the lead or opportunity the message is linked to, or empty when not linked. - `messageId: ID` Id of the email or memo on this link. ### UpdateMessageRelationInput (input) Id of a MessageRelation record and the field values to change. - `clientMutationId: String` Optional client-supplied identifier passed on a mutation input and echoed back unchanged on its payload, so a client can correlate the response with its request (Relay convention). - `id: ID!` Unique identifier of entity. - `modified: DateTime` Last modification time. - `created: DateTime` Creation time. - `accountId: ID` Id of the linked account. - `contactId: ID` Id of the linked contact. - `customEntityId: ID` Id of the linked custom entity record. - `leadOpptyId: ID` Id of the lead or opportunity the message is linked to, or empty when not linked. - `messageId: ID` Id of the email or memo on this link. - `projectId: ID` Id of the linked project. - `quoteId: ID` Id of the linked quote. - `revision: Int` Revision when entity was lastly changed. ### BulkUpdateMessageRelationPayload (object) Result of the bulkUpdateMessageRelation mutation. - `result: BulkUpdateResults!` Ids of the created, updated and deleted records, and the items that failed. ### CreateMessageRelationPayload (object) Result of the createMessageRelation mutation. - `messageRelation: MessageRelationEntity` The created record. - `clientMutationId: String` Optional client-supplied identifier passed on a mutation input and echoed back unchanged on its payload, so a client can correlate the response with its request (Relay convention). ### DeleteMessageRelationPayload (object) Result of the deleteMessageRelation mutation. - `messageRelation: MessageRelationEntity` The deleted record. - `clientMutationId: String` Optional client-supplied identifier passed on a mutation input and echoed back unchanged on its payload, so a client can correlate the response with its request (Relay convention). ### UpdateMessageRelationPayload (object) Result of the updateMessageRelation mutation. - `messageRelation: MessageRelationEntity` The updated record. - `clientMutationId: String` Optional client-supplied identifier passed on a mutation input and echoed back unchanged on its payload, so a client can correlate the response with its request (Relay convention). Types several repositories share, such as `PageInfo` and the filter fields, are in the [types index](https://developers.coevera.com/reference/graphql/types.md). The [SDL](https://developers.coevera.com/graphql/schema.graphql) has the whole schema in one file. ## Example ```graphql query FirstMessageRelations { entities { messageRelation { getByCriteria(first: 3, orderBy: [{ modified: Desc }]) { totalCount edges { node { id modified } } } } } } ``` ```bash curl 'https://{region}.api.coevera.com/api/v100/app/space/{space_id}/graphql/public' \ --user "$COEVERA_API_KEY:$COEVERA_API_SECRET" \ --header 'Content-Type: application/json' \ --data '{"query":"query FirstMessageRelations { entities { messageRelation { getByCriteria(first: 3, orderBy: [{ modified: Desc }]) { totalCount edges { node { id modified } } } } } }"}' ```