Queries for tasks that fulfill a given filter.The size of the result set can be retrieved by using the Get Task Count method.

Security Consideration

There are several query parameters (such as assigneeExpression) for specifying an EL expression. These are disabled by default to prevent remote code execution. See the section on security considerations for custom code in the user guide for details.

Method

GET /task

Parameters

Query Parameters

Name Description
processInstanceId Restrict to tasks that belong to process instances with the given id.
processInstanceBusinessKey Restrict to tasks that belong to process instances with the given business key.
processInstanceBusinessKeyExpression Restrict to tasks that belong to process instances with the given business key which is described by an expression. See the user guide for more information on available functions.
processInstanceBusinessKeyIn Restrict to tasks that belong to process instances with one of the give business keys. The keys need to be in a comma-separated list.
processInstanceBusinessKeyLike Restrict to tasks that have a process instance business key that has the parameter value as a substring.
processInstanceBusinessKeyLikeExpression Restrict to tasks that have a process instance business key that has the parameter value as a substring and is described by an expression. See the user guide for more information on available functions.
processDefinitionId Restrict to tasks that belong to a process definition with the given id.
processDefinitionKey Restrict to tasks that belong to a process definition with the given key.
processDefinitionKeyIn Restrict to tasks that belong to a process definition with one of the given keys. The keys need to be in a comma-separated list.
processDefinitionName Restrict to tasks that belong to a process definition with the given name.
processDefinitionNameLike Restrict to tasks that have a process definition name that has the parameter value as a substring.
executionId Restrict to tasks that belong to an execution with the given id.
caseInstanceId Restrict to tasks that belong to case instances with the given id.
caseInstanceBusinessKey Restrict to tasks that belong to case instances with the given business key.
caseInstanceBusinessKeyLike Restrict to tasks that have a case instance business key that has the parameter value as a substring.
caseDefinitionId Restrict to tasks that belong to a case definition with the given id.
caseDefinitionKey Restrict to tasks that belong to a case definition with the given key.
caseDefinitionName Restrict to tasks that belong to a case definition with the given name.
caseDefinitionNameLike Restrict to tasks that have a case definition name that has the parameter value as a substring.
caseExecutionId Restrict to tasks that belong to a case execution with the given id.
activityInstanceIdIn Only include tasks which belong to one of the passed and comma-separated activity instance ids.
tenantIdIn Only include tasks which belong to one of the passed and comma-separated tenant ids.
withoutTenantId Only include tasks which belong to no tenant. Value may only be true, as false is the default behavior.
assignee Restrict to tasks that the given user is assigned to.
assigneeExpression Restrict to tasks that the user described by the given expression is assigned to. See the user guide for more information on available functions.
assigneeLike Restrict to tasks that have an assignee that has the parameter value as a substring.
assigneeLikeExpression Restrict to tasks that have an assignee that has the parameter value described by the given expression as a substring. See the user guide for more information on available functions.
owner Restrict to tasks that the given user owns.
ownerExpression Restrict to tasks that the user described by the given expression owns. See the user guide for more information on available functions.
candidateGroup Only include tasks that are offered to the given group.
candidateGroupExpression Only include tasks that are offered to the group described by the given expression. See the user guide for more information on available functions.
candidateUser Only include tasks that are offered to the given user or to one of his groups.
candidateUserExpression Only include tasks that are offered to the user described by the given expression. See the user guide for more information on available functions.
includeAssignedTasks Also include tasks that are assigned to users in candidate queries. Default is to only include tasks that are not assigned to any user if you query by candidate user or group(s).
involvedUser Only include tasks that the given user is involved in. A user is involved in a task if an identity link exists between task and user (e.g., the user is the assignee).
involvedUserExpression Only include tasks that the user described by the given expression is involved in. A user is involved in a task if an identity link exists between task and user (e.g., the user is the assignee). See the user guide for more information on available functions.
assigned If set to true, restricts the query to all tasks that are assigned.
unassigned If set to true, restricts the query to all tasks that are unassigned.
taskDefinitionKey Restrict to tasks that have the given key.
taskDefinitionKeyIn Restrict to tasks that have one of the given keys. The keys need to be in a comma-separated list.
taskDefinitionKeyLike Restrict to tasks that have a key that has the parameter value as a substring.
name Restrict to tasks that have the given name.
nameNotEqual Restrict to tasks that do not have the given name.
nameLike Restrict to tasks that have a name with the given parameter value as substring.
nameNotLike Restrict to tasks that do not have a name with the given parameter value as substring.
description Restrict to tasks that have the given description.
descriptionLike Restrict to tasks that have a description that has the parameter value as a substring.
priority Restrict to tasks that have the given priority.
maxPriority Restrict to tasks that have a lower or equal priority.
minPriority Restrict to tasks that have a higher or equal priority.
dueDate Restrict to tasks that are due on the given date. By default*, the date must have the format yyyy-MM-dd'T'HH:mm:ss.SSSZ, e.g., 2013-01-23T14:42:45.546+0200.
dueDateExpression Restrict to tasks that are due on the date described by the given expression. See the user guide for more information on available functions. The expression must evaluate to a java.util.Date or org.joda.time.DateTime object.
dueAfter Restrict to tasks that are due after the given date. By default*, the date must have the format yyyy-MM-dd'T'HH:mm:ss.SSSZ, e.g., 2013-01-23T14:42:45.435+0200.
dueAfterExpression Restrict to tasks that are due after the date described by the given expression. See the user guide for more information on available functions. The expression must evaluate to a java.util.Date or org.joda.time.DateTime object.
dueBefore Restrict to tasks that are due before the given date. By default*, the date must have the format yyyy-MM-dd'T'HH:mm:ss.SSSZ, e.g., 2013-01-23T14:42:45.243+0200.
dueBeforeExpression Restrict to tasks that are due before the date described by the given expression. See the user guide for more information on available functions. The expression must evaluate to a java.util.Date or org.joda.time.DateTime object.
followUpDate Restrict to tasks that have a followUp date on the given date. By default*, the date must have the format yyyy-MM-dd'T'HH:mm:ss.SSSZ, e.g., 2013-01-23T14:42:45.342+0200.
followUpDateExpression Restrict to tasks that have a followUp date on the date described by the given expression. See the user guide for more information on available functions. The expression must evaluate to a java.util.Date or org.joda.time.DateTime object.
followUpAfter Restrict to tasks that have a followUp date after the given date. By default*, the date must have the format yyyy-MM-dd'T'HH:mm:ss.SSSZ, e.g., 2013-01-23T14:42:45.542+0200.
followUpAfterExpression Restrict to tasks that have a followUp date after the date described by the given expression. See the user guide for more information on available functions. The expression must evaluate to a java.util.Date or org.joda.time.DateTime object.
followUpBefore Restrict to tasks that have a followUp date before the given date. By default*, the date must have the format yyyy-MM-dd'T'HH:mm:ss.SSSZ, e.g., 2013-01-23T14:42:45.234+0200.
followUpBeforeExpression Restrict to tasks that have a followUp date before the date described by the given expression. See the user guide for more information on available functions. The expression must evaluate to a java.util.Date or org.joda.time.DateTime object.
followUpBeforeOrNotExistent Restrict to tasks that have no followUp date or a followUp date before the given date. By default*, the date must have the format yyyy-MM-dd'T'HH:mm:ss.SSSZ, e.g., 2013-01-23T14:42:45.432+0200. The typical use case is to query all "active" tasks for a user for a given date.
followUpBeforeOrNotExistentExpression Restrict to tasks that have no followUp date or a followUp date before the date described by the given expression. See the user guide for more information on available functions. The expression must evaluate to a java.util.Date or org.joda.time.DateTime object.
createdOn Restrict to tasks that were created on the given date. By default*, the date must have the format yyyy-MM-dd'T'HH:mm:ss.SSSZ, e.g., 2013-01-23T14:42:45.324+0200.
createdOnExpression Restrict to tasks that were created on the date described by the given expression. See the user guide for more information on available functions. The expression must evaluate to a java.util.Date or org.joda.time.DateTime object.
createdAfter Restrict to tasks that were created after the given date. By default*, the date must have the format yyyy-MM-dd'T'HH:mm:ss.SSSZ, e.g., 2013-01-23T14:42:45.342+0200.
createdAfterExpression Restrict to tasks that were created after the date described by the given expression. See the user guide for more information on available functions. The expression must evaluate to a java.util.Date or org.joda.time.DateTime object.
createdBefore Restrict to tasks that were created before the given date. By default*, the date must have the format yyyy-MM-dd'T'HH:mm:ss.SSSZ, e.g., 2013-01-23T14:42:45.332+0200.
createdBeforeExpression Restrict to tasks that were created before the date described by the given expression. See the user guide for more information on available functions. The expression must evaluate to a java.util.Date or org.joda.time.DateTime object.
delegationState Restrict to tasks that are in the given delegation state. Valid values are PENDING and RESOLVED.
candidateGroups Restrict to tasks that are offered to any of the given candidate groups. Takes a comma-separated list of group names, so for example developers,support,sales.
candidateGroupsExpression Restrict to tasks that are offered to any of the candidate groups described by the given expression. See the user guide for more information on available functions. The expression must evaluate to java.util.List of Strings.
withCandidateGroups Only include tasks which have a candidate group. Value may only be true, as false is the default behavior.
withoutCandidateGroups Only include tasks which have no candidate group. Value may only be true, as false is the default behavior.
withCandidateUsers Only include tasks which have a candidate user. Value may only be true, as false is the default behavior.
withoutCandidateUsers Only include tasks which have no candidate users. Value may only be true, as false is the default behavior.
active Only include active tasks. Value may only be true, as false is the default behavior.
suspended Only include suspended tasks. Value may only be true, as false is the default behavior.
taskVariables Only include tasks that have variables with certain values. Variable filtering expressions are comma-separated and are structured as follows: A valid parameter value has the form key_operator_value. key is the variable name, operator is the comparison operator to be used and value the variable value.Note: Values are always treated as String objects on server side. Valid operator values are: eq - equal to; neq - not equal to; gt - greater than; gteq - greater than or equal to; lt - lower than; lteq - lower than or equal to; like. key and value may not contain underscore or comma characters.
processVariables Only include tasks that belong to process instances that have variables with certain values. Variable filtering expressions are comma-separated and are structured as follows: A valid parameter value has the form key_operator_value. key is the variable name, operator is the comparison operator to be used and value the variable value.Note: Values are always treated as String objects on server side. Valid operator values are: eq - equal to; neq - not equal to; gt - greater than; gteq - greater than or equal to; lt - lower than; lteq - lower than or equal to; like. key and value may not contain underscore or comma characters.
caseInstanceVariables Only include tasks that belong to case instances that have variables with certain values. Variable filtering expressions are comma-separated and are structured as follows: A valid parameter value has the form key_operator_value. key is the variable name, operator is the comparison operator to be used and value the variable value.Note: Values are always treated as String objects on server side. Valid operator values are: eq - equal to; neq - not equal to; gt - greater than; gteq - greater than or equal to; lt - lower than; lteq - lower than or equal to; like. key and value may not contain underscore or comma characters.
parentTaskId Restrict query to all tasks that are sub tasks of the given task. Takes a task id.
sortBy Sort the results lexicographically by a given criterion. Valid values are instanceId, caseInstanceId, dueDate, executionId, caseExecutionId,assignee, created, description, id, name, nameCaseInsensitive and priority. Must be used in conjunction with the sortOrder parameter.
sortOrder Sort the results in a given order. Values may be asc for ascending order or desc for descending order. Must be used in conjunction with the sortBy parameter.
firstResult Pagination of results. Specifies the index of the first result to return.
maxResults Pagination of results. Specifies the maximum number of results to return. Will return less results if there are no more results left.

Result

A JSON array of task objects.Each task object has the following properties:

Name Value Description
id String The task id.
name String The task name.
assignee String The assignee's id.
owner String The owner's id.
created String The date the task was created on. Default format* yyyy-MM-dd'T'HH:mm:ss.SSSZ.
due String The task's due date. Default format* yyyy-MM-dd'T'HH:mm:ss.SSSZ.
followUp String The follow-up date for the task. Default format* yyyy-MM-dd'T'HH:mm:ss.SSSZ.
delegationState String The task's delegation state. Possible values are PENDING and RESOLVED.
description String The task's description.
executionId String The id of the execution the task belongs to.
parentTaskId String The id the parent task, if this task is a subtask.
priority Number The task's priority.
processDefinitionId String The id of the process definition the task belongs to.
processInstanceId String The id of the process instance the task belongs to.
caseExecutionId String The id of the case execution the task belongs to.
caseDefinitionId String The id of the case definition the task belongs to.
caseInstanceId String The id of the case instance the task belongs to.
taskDefinitionKey String The task's key.
suspended Boolean Whether the task belongs to a process instance that is suspended.
formKey String If not null, the form key for the task.
tenantId String If not null, the tenant id of the task.

Response Codes

Code Media type Description
200 application/json Request successful.
200 application/hal+json Request successful. In case of an expected HAL response.
400 application/json Returned if some of the query parameters are invalid, for example if a sortOrder parameter is supplied, but no sortBy, or if an invalid operator for variable comparison is used. See the Introduction for the error response format.

Example

Request

GET /task?assignee=anAssignee&delegationState=RESOLVED&maxPriority=50

Response

  1. [{"id":"anId",
  2.  "name":"aName",
  3.  "assignee":"anAssignee",
  4.  "created":"2013-01-23T13:42:42.657+0200",
  5.  "due":"2013-01-23T13:49:42.323+0200",
  6.  "followUp:":"2013-01-23T13:44:42.987+0200",
  7.  "delegationState":"RESOLVED",
  8.  "description":"aDescription",
  9.  "executionId":"anExecution",
  10.  "owner":"anOwner",
  11.  "parentTaskId":"aParentId",
  12.  "priority":42,
  13.  "processDefinitionId":"aProcDefId",
  14.  "processInstanceId":"aProcInstId",
  15.  "caseDefinitionId":"aCaseDefId",
  16.  "caseInstanceId":"aCaseInstId",
  17.  "caseExecutionId":"aCaseExecution",
  18.  "taskDefinitionKey":"aTaskDefinitionKey",
  19.  "suspended": false,
  20.  "formKey":"aFormKey",
  21.  "tenantId": "aTenantId" }]

原文: https://docs.camunda.org/manual/7.9/reference/rest/task/get-query/