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history.get
Description
integer/array history.get(object parameters)
The method allows to retrieve history data according to the given parameters.
See also: known issues
This method may return historical data of a deleted entity if this data has not been removed by the housekeeper yet.
Parameters
(object) Parameters defining the desired output.
The method supports the following parameters.
| Parameter | Type | Description |
|---|---|---|
| history | integer | History object types to return. Possible values: 0 - numeric float; 1 - character; 2 - log; 3 - numeric unsigned; 4 - text. Default: 3. |
| hostids | string/array | Return only history from the given hosts. |
| itemids | string/array | Return only history from the given items. |
| time_from | timestamp | Return only values that have been received after or at the given time. |
| time_till | timestamp | Return only values that have been received before or at the given time. |
| sortfield | string/array | Sort the result by the given properties. Possible values are: itemid and clock. |
| countOutput | boolean | These parameters being common for all get methods are described in detail in the reference commentary page. |
| editable | boolean | |
| excludeSearch | boolean | |
| filter | object | |
| limit | integer | |
| output | query | |
| search | object | |
| searchByAny | boolean | |
| searchWildcardsEnabled | boolean | |
| sortorder | string/array | |
| startSearch | boolean |
Return values
(integer/array) Returns either:
- an array of objects;
- the count of retrieved objects, if the
countOutputparameter has been used.
Examples
Retrieving item history data
Return 10 latest values received from a numeric(float) item.
Request:
{
"jsonrpc": "2.0",
"method": "history.get",
"params": {
"output": "extend",
"history": 0,
"itemids": "23296",
"sortfield": "clock",
"sortorder": "DESC",
"limit": 10
},
"auth": "038e1d7b1735c6a5436ee9eae095879e",
"id": 1
}Response:
{
"jsonrpc": "2.0",
"result": [
{
"itemid": "23296",
"clock": "1351090996",
"value": "0.085",
"ns": "563157632"
},
{
"itemid": "23296",
"clock": "1351090936",
"value": "0.16",
"ns": "549216402"
},
{
"itemid": "23296",
"clock": "1351090876",
"value": "0.18",
"ns": "537418114"
},
{
"itemid": "23296",
"clock": "1351090816",
"value": "0.21",
"ns": "522659528"
},
{
"itemid": "23296",
"clock": "1351090756",
"value": "0.215",
"ns": "507809457"
},
{
"itemid": "23296",
"clock": "1351090696",
"value": "0.255",
"ns": "495509699"
},
{
"itemid": "23296",
"clock": "1351090636",
"value": "0.36",
"ns": "477708209"
},
{
"itemid": "23296",
"clock": "1351090576",
"value": "0.375",
"ns": "463251343"
},
{
"itemid": "23296",
"clock": "1351090516",
"value": "0.315",
"ns": "447947017"
},
{
"itemid": "23296",
"clock": "1351090456",
"value": "0.275",
"ns": "435307141"
}
],
"id": 1
}Source
CHistory::get() in ui/include/classes/api/services/CHistory.php.