JSON.OBJLEN

Report the number of keys in the JSON object at path in key

Examples

Required arguments

<details open><summary><code>key</code></summary>

is key to parse. Returns null for nonexistent keys.

</details>

Optional arguments

<details open><summary><code>path</code></summary>

is JSONPath to specify. Default is root $. Returns null for nonexistant path.

</details>

Examples

{{< highlight bash >}} redis> JSON.SET doc $ '{"a":[3], "nested": {"a": {"b":2, "c": 1}}}' OK redis> JSON.OBJLEN doc $..a

1. (nil)
2. (integer) 2 {{< / highlight >}}

Redis Software and Redis Cloud compatibility

| Redis Software | Redis Cloud | <span style="min-width: 9em; display: table-cell">Notes</span> | |:----------------------|:-----------------|:------| | <span title="Supported">✅ Supported</span> | <span title="Supported">✅ Flexible & Annual</span> <span title="Supported">✅ Free & Fixed</nobr></span> | |

Return information

{{< multitabs id="json-objlen-return-info" tab1="RESP2" tab2="RESP3" >}}

With $-based path argument: [Array reply]({{< relref "/develop/reference/protocol-spec#arrays" >}}) of [integer replies]({{< relref "/develop/reference/protocol-spec#integers" >}}) or [null replies]({{< relref "/develop/reference/protocol-spec#nulls" >}}), where each element is the number of keys in the object, or null if the matching value is not an object.

With .-based path argument: [Integer reply]({{< relref "/develop/reference/protocol-spec#integers" >}}) representing the number of keys in the object, or [null reply]({{< relref "/develop/reference/protocol-spec#nulls" >}}) if the matching value is not an object.

-tab-sep-

With $-based path argument (default): [Array reply]({{< relref "/develop/reference/protocol-spec#arrays" >}}) of [integer replies]({{< relref "/develop/reference/protocol-spec#integers" >}}) or [null replies]({{< relref "/develop/reference/protocol-spec#nulls" >}}), where each element is the number of keys in the object, or null if the matching value is not an object.

With .-based path argument: [Integer reply]({{< relref "/develop/reference/protocol-spec#integers" >}}) representing the number of keys in the object, or [null reply]({{< relref "/develop/reference/protocol-spec#nulls" >}}) if the matching value is not an object.

{{< /multitabs >}}

See also

[JSON.ARRINDEX]({{< relref "commands/json.arrindex/" >}}) | [JSON.ARRINSERT]({{< relref "commands/json.arrinsert/" >}})

Related topics

• [RedisJSON]({{< relref "/develop/data-types/json/" >}})
• [Index and search JSON documents]({{< relref "/develop/ai/search-and-query/indexing/" >}})