[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-09-04 UTC."],[],[],null,["# Firestore in Datastore mode V1 API - Class Google::Cloud::Datastore::V1::LookupRequest (v1.4.1)\n\nVersion latestkeyboard_arrow_down\n\n- [1.4.1 (latest)](/ruby/docs/reference/google-cloud-datastore-v1/latest/Google-Cloud-Datastore-V1-LookupRequest)\n- [1.4.0](/ruby/docs/reference/google-cloud-datastore-v1/1.4.0/Google-Cloud-Datastore-V1-LookupRequest)\n- [1.3.1](/ruby/docs/reference/google-cloud-datastore-v1/1.3.1/Google-Cloud-Datastore-V1-LookupRequest)\n- [1.2.0](/ruby/docs/reference/google-cloud-datastore-v1/1.2.0/Google-Cloud-Datastore-V1-LookupRequest)\n- [1.1.0](/ruby/docs/reference/google-cloud-datastore-v1/1.1.0/Google-Cloud-Datastore-V1-LookupRequest)\n- [1.0.1](/ruby/docs/reference/google-cloud-datastore-v1/1.0.1/Google-Cloud-Datastore-V1-LookupRequest)\n- [0.19.0](/ruby/docs/reference/google-cloud-datastore-v1/0.19.0/Google-Cloud-Datastore-V1-LookupRequest)\n- [0.18.0](/ruby/docs/reference/google-cloud-datastore-v1/0.18.0/Google-Cloud-Datastore-V1-LookupRequest)\n- [0.17.0](/ruby/docs/reference/google-cloud-datastore-v1/0.17.0/Google-Cloud-Datastore-V1-LookupRequest)\n- [0.16.3](/ruby/docs/reference/google-cloud-datastore-v1/0.16.3/Google-Cloud-Datastore-V1-LookupRequest)\n- [0.15.0](/ruby/docs/reference/google-cloud-datastore-v1/0.15.0/Google-Cloud-Datastore-V1-LookupRequest)\n- [0.14.0](/ruby/docs/reference/google-cloud-datastore-v1/0.14.0/Google-Cloud-Datastore-V1-LookupRequest)\n- [0.13.1](/ruby/docs/reference/google-cloud-datastore-v1/0.13.1/Google-Cloud-Datastore-V1-LookupRequest)\n- [0.12.0](/ruby/docs/reference/google-cloud-datastore-v1/0.12.0/Google-Cloud-Datastore-V1-LookupRequest)\n- [0.11.1](/ruby/docs/reference/google-cloud-datastore-v1/0.11.1/Google-Cloud-Datastore-V1-LookupRequest)\n- [0.10.0](/ruby/docs/reference/google-cloud-datastore-v1/0.10.0/Google-Cloud-Datastore-V1-LookupRequest)\n- [0.9.0](/ruby/docs/reference/google-cloud-datastore-v1/0.9.0/Google-Cloud-Datastore-V1-LookupRequest)\n- [0.8.0](/ruby/docs/reference/google-cloud-datastore-v1/0.8.0/Google-Cloud-Datastore-V1-LookupRequest)\n- [0.7.0](/ruby/docs/reference/google-cloud-datastore-v1/0.7.0/Google-Cloud-Datastore-V1-LookupRequest)\n- [0.6.0](/ruby/docs/reference/google-cloud-datastore-v1/0.6.0/Google-Cloud-Datastore-V1-LookupRequest)\n- [0.5.0](/ruby/docs/reference/google-cloud-datastore-v1/0.5.0/Google-Cloud-Datastore-V1-LookupRequest)\n- [0.4.0](/ruby/docs/reference/google-cloud-datastore-v1/0.4.0/Google-Cloud-Datastore-V1-LookupRequest)\n- [0.3.5](/ruby/docs/reference/google-cloud-datastore-v1/0.3.5/Google-Cloud-Datastore-V1-LookupRequest) \nReference documentation and code samples for the Firestore in Datastore mode V1 API class Google::Cloud::Datastore::V1::LookupRequest.\n\nThe request for [Datastore.Lookup](/ruby/docs/reference/google-cloud-datastore-v1/latest/Google-Cloud-Datastore-V1-Datastore-Client#Google__Cloud__Datastore__V1__Datastore__Client_lookup_instance_ \"Google::Cloud::Datastore::V1::Datastore::Client#lookup (method)\"). \n\nInherits\n--------\n\n- Object \n\nExtended By\n-----------\n\n- Google::Protobuf::MessageExts::ClassMethods \n\nIncludes\n--------\n\n- Google::Protobuf::MessageExts\n\nMethods\n-------\n\n### #database_id\n\n def database_id() -\u003e ::String\n\n**Returns**\n\n- (::String) --- The ID of the database against which to make the request.\n\n '(default)' is not allowed; please use empty string '' to refer the default\n database.\n\n### #database_id=\n\n def database_id=(value) -\u003e ::String\n\n**Parameter**\n\n- **value** (::String) --- The ID of the database against which to make the request.\n\n\n '(default)' is not allowed; please use empty string '' to refer the default\ndatabase. \n**Returns**\n\n- (::String) --- The ID of the database against which to make the request.\n\n '(default)' is not allowed; please use empty string '' to refer the default\n database.\n\n### #keys\n\n def keys() -\u003e ::Array\u003c::Google::Cloud::Datastore::V1::Key\u003e\n\n**Returns**\n\n- (::Array\\\u003c[::Google::Cloud::Datastore::V1::Key](./Google-Cloud-Datastore-V1-Key)\\\u003e) --- Required. Keys of entities to look up.\n\n### #keys=\n\n def keys=(value) -\u003e ::Array\u003c::Google::Cloud::Datastore::V1::Key\u003e\n\n**Parameter**\n\n- **value** (::Array\\\u003c[::Google::Cloud::Datastore::V1::Key](./Google-Cloud-Datastore-V1-Key)\\\u003e) --- Required. Keys of entities to look up. \n**Returns**\n\n- (::Array\\\u003c[::Google::Cloud::Datastore::V1::Key](./Google-Cloud-Datastore-V1-Key)\\\u003e) --- Required. Keys of entities to look up.\n\n### #project_id\n\n def project_id() -\u003e ::String\n\n**Returns**\n\n- (::String) --- Required. The ID of the project against which to make the request.\n\n### #project_id=\n\n def project_id=(value) -\u003e ::String\n\n**Parameter**\n\n- **value** (::String) --- Required. The ID of the project against which to make the request. \n**Returns**\n\n- (::String) --- Required. The ID of the project against which to make the request.\n\n### #property_mask\n\n def property_mask() -\u003e ::Google::Cloud::Datastore::V1::PropertyMask\n\n**Returns**\n\n- ([::Google::Cloud::Datastore::V1::PropertyMask](./Google-Cloud-Datastore-V1-PropertyMask)) --- The properties to return. Defaults to returning all properties.\n\n\n If this field is set and an entity has a property not referenced in the\n mask, it will be absent from \\[LookupResponse.found.entity.properties\\]\\[\\].\n\n The entity's key is always returned.\n\n### #property_mask=\n\n def property_mask=(value) -\u003e ::Google::Cloud::Datastore::V1::PropertyMask\n\n**Parameter**\n\n- **value** ([::Google::Cloud::Datastore::V1::PropertyMask](./Google-Cloud-Datastore-V1-PropertyMask)) --- The properties to return. Defaults to returning all properties.\n\n\n If this field is set and an entity has a property not referenced in the\n mask, it will be absent from \\[LookupResponse.found.entity.properties\\]\\[\\].\n\nThe entity's key is always returned. \n**Returns**\n\n- ([::Google::Cloud::Datastore::V1::PropertyMask](./Google-Cloud-Datastore-V1-PropertyMask)) --- The properties to return. Defaults to returning all properties.\n\n\n If this field is set and an entity has a property not referenced in the\n mask, it will be absent from \\[LookupResponse.found.entity.properties\\]\\[\\].\n\n The entity's key is always returned.\n\n### #read_options\n\n def read_options() -\u003e ::Google::Cloud::Datastore::V1::ReadOptions\n\n**Returns**\n\n- ([::Google::Cloud::Datastore::V1::ReadOptions](./Google-Cloud-Datastore-V1-ReadOptions)) --- The options for this lookup request.\n\n### #read_options=\n\n def read_options=(value) -\u003e ::Google::Cloud::Datastore::V1::ReadOptions\n\n**Parameter**\n\n- **value** ([::Google::Cloud::Datastore::V1::ReadOptions](./Google-Cloud-Datastore-V1-ReadOptions)) --- The options for this lookup request. \n**Returns**\n\n- ([::Google::Cloud::Datastore::V1::ReadOptions](./Google-Cloud-Datastore-V1-ReadOptions)) --- The options for this lookup request."]]