Query for the number of variable instances that fulfill given parameters. This method takes the same message body as theGet Variable Instances (POST) method and therefore it is slightly more powerful than the Get Variable Instance Count method.

Method

POST /variable-instance/count

Parameters

Request Body

A JSON object with the following properties:

Name	Description
variableName	Filter by variable instance name.
variableNameLike	Filter by the variable instance name. The parameter can include the wildcard `%` to express like-strategy such as: starts with (`%`name), ends with (name`%`) or contains (`%`name`%`).
processInstanceIdIn	Only include variable instances which belong to one of the passed process instance ids.
executionIdIn	Only include variable instances which belong to one of the passed execution ids.
caseInstanceIdIn	Only include variable instances which belong to one of the passed case instance ids.
caseExecutionIdIn	Only include variable instances which belong to one of the passed case execution ids.
taskIdIn	Only include variable instances which belong to one of the passed task ids.
activityInstanceIdIn	Only include variable instances which belong to one of the passed activity instance ids.
tenantIdIn	Only include variable instances which belong to one of the passed and comma-separated tenant ids.
variableValues	A JSON array to only include variable instances that have the certain values. The array consists of objects with the three properties `name`, `operator` and `value`. `name (String)` is the variable name, `operator (String)` is the comparison operator to be used and `value` the variable value. `value` may be `String`, `Number` or `Boolean`. 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`.
sortBy	Sort the results lexicographically by a given criterion. Valid values are `variableName`, `variableType`, `activityInstanceId` and `tenantId`. 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.

Result

A JSON object that contains the count as the only property.

Name	Value	Description
count	Number	The number of matching variable instances.

Response Codes

Code	Media type	Description
200	application/json	Request successful.
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

POST /variable-instance/count

Request Body:

{"variableValuess": 
    [{"name": "amount",
     "operator": "gteq",
     "value": "5"
    },
    {"name": "amount",
     "operator": "lteq",
     "value": 200}],
"processInstanceIdIn": [ "aProcessInstanceId", "anotherProcessInstanceId" ]}

Response

{"count": 3}

原文: https://docs.camunda.org/manual/7.9/reference/rest/variable-instance/post-query-count/

Get List Count (POST)