Value

A message that can hold any of the supported value types and associated metadata.

JSON representation 
{
  "meaning": integer,
  "excludeFromIndexes": boolean,

  // Union field value_type can be only one of the following:
  "nullValue": null,
  "booleanValue": boolean,
  "integerValue": string,
  "doubleValue": number,
  "timestampValue": string,
  "keyValue": {
    object (Key)
  },
  "stringValue": string,
  "blobValue": string,
  "geoPointValue": {
    object (LatLng)
  },
  "entityValue": {
    object (Entity)
  },
  "arrayValue": {
    object (ArrayValue)
  }
  // End of list of possible types for union field value_type.
}
Fields
meaning

integer

The meaning field should only be populated for backwards compatibility.
excludeFromIndexes

boolean

If the value should be excluded from all indexes including those defined explicitly.
Union field value_type. Must have a value set. value_type can be only one of the following:
nullValue

null

A null value.
booleanValue

boolean

A boolean value.
integerValue

string (int64 format)

An integer value.
doubleValue

number

A double value.
timestampValue

string (Timestamp format)

A timestamp value. When stored in the Datastore, precise only to microseconds; any additional precision is rounded down.

A timestamp in RFC3339 UTC "Zulu" format, with nanosecond resolution and up to nine fractional digits. Examples: "2014-10-02T15:01:23Z" and "2014-10-02T15:01:23.045123456Z".
keyValue

object (Key)

A key value.
stringValue

string

A UTF-8 encoded string value. When excludeFromIndexes is false (it is indexed) , may have at most 1500 bytes. Otherwise, may be set to at most 1,000,000 bytes.
blobValue

string (bytes format)

A blob value. May have at most 1,000,000 bytes. When excludeFromIndexes is false, may have at most 1500 bytes. In JSON requests, must be base64-encoded.

A base64-encoded string.
geoPointValue

object (LatLng)

A geo point value representing a point on the surface of Earth.
entityValue

object (Entity)

An entity value.

  • May have no key.
  • May have a key with an incomplete key path.
  • May have a reserved/read-only key.
arrayValue

object (ArrayValue)

An array value. Cannot contain another array value. A Value instance that sets field arrayValue must not set fields meaning or excludeFromIndexes.

Key

A unique identifier for an entity. If a key's partition ID or any of its path kinds or names are reserved/read-only, the key is reserved/read-only. A reserved/read-only key is forbidden in certain documented contexts.

JSON representation 
{
  "partitionId": {
    object (PartitionId)
  },
  "path": [
    {
      object (PathElement)
    }
  ]
}
Fields
partitionId

object (PartitionId)

Entities are partitioned into subsets, currently identified by a project ID and namespace ID. Queries are scoped to a single partition.
path[]

object (PathElement)

The entity path. An entity path consists of one or more elements composed of a kind and a string or numerical identifier, which identify entities. The first element identifies a root entity, the second element identifies a child of the root entity, the third element identifies a child of the second entity, and so forth. The entities identified by all prefixes of the path are called the element's ancestors.

An entity path is always fully complete: all of the entity's ancestors are required to be in the path along with the entity identifier itself. The only exception is that in some documented cases, the identifier in the last path element (for the entity) itself may be omitted. For example, the last path element of the key of Mutation.insert may have no identifier.

A path can never be empty, and a path can have at most 100 elements.

PartitionId

A partition ID identifies a grouping of entities. The grouping is always by project and namespace, however the namespace ID may be empty.

A partition ID contains several dimensions: project ID and namespace ID.

Partition dimensions:

  • May be "".
  • Must be valid UTF-8 bytes.
  • Must have values that match regex [A-Za-z\d\.\-_]{1,100} If the value of any dimension matches regex __.*__, the partition is reserved/read-only. A reserved/read-only partition ID is forbidden in certain documented contexts.

Foreign partition IDs (in which the project ID does not match the context project ID ) are discouraged. Reads and writes of foreign partition IDs may fail if the project is not in an active state.

JSON representation 
{
  "projectId": string,
  "databaseId": string,
  "namespaceId": string
}
Fields
projectId

string

The ID of the project to which the entities belong.
databaseId

string

If not empty, the ID of the database to which the entities belong.
namespaceId

string

If not empty, the ID of the namespace to which the entities belong.

PathElement

A (kind, ID/name) pair used to construct a key path.

If either name or ID is set, the element is complete. If neither is set, the element is incomplete.

JSON representation 
{
  "kind": string,

  // Union field id_type can be only one of the following:
  "id": string,
  "name": string
  // End of list of possible types for union field id_type.
}
Fields
kind

string

The kind of the entity.

A kind matching regex __.*__ is reserved/read-only. A kind must not contain more than 1500 bytes when UTF-8 encoded. Cannot be "".

Must be valid UTF-8 bytes. Legacy values that are not valid UTF-8 are encoded as __bytes<X>__ where <X> is the base-64 encoding of the bytes.
Union field id_type. The type of ID. id_type can be only one of the following:
id

string (int64 format)

The auto-allocated ID of the entity.

Never equal to zero. Values less than zero are discouraged and may not be supported in the future.
name

string

The name of the entity.

A name matching regex __.*__ is reserved/read-only. A name must not be more than 1500 bytes when UTF-8 encoded. Cannot be "".

Must be valid UTF-8 bytes. Legacy values that are not valid UTF-8 are encoded as __bytes<X>__ where <X> is the base-64 encoding of the bytes.

Entity

A Datastore data object.

Must not exceed 1 MiB - 4 bytes.

JSON representation 
{
  "key": {
    object (Key)
  },
  "properties": {
    string: {
      object (Value)
    },
    ...
  }
}
Fields
key

object (Key)

The entity's key.

An entity must have a key, unless otherwise documented (for example, an entity in Value.entity_value may have no key). An entity's kind is its key path's last element's kind, or null if it has no key.
properties

map (key: string, value: object (Value))

The entity's properties. The map's keys are property names. A property name matching regex __.*__ is reserved. A reserved property name is forbidden in certain documented contexts. The map keys, represented as UTF-8, must not exceed 1,500 bytes and cannot be empty.

An object containing a list of "key": value pairs. Example: { "name": "wrench", "mass": "1.3kg", "count": "3" }.