AttachmentQuery | API Reference | ArcGIS Maps SDK for JavaScript 4.31

This class defines parameters for executing queries for feature attachments from a feature layer. Once an AttachmentQuery object's properties are defined, it can then be passed into the query.executeAttachmentQuery() or FeatureLayer.queryAttachments() methods, which will return attachmentInfos grouped by the source feature objectIds.

Known Limitations

All properties except objectIds require an ArcGIS Server service 10.5 or greater, and feature layer's capabilities.query.supportsAttachments to be true.
When the feature layer's capabilities.query.supportsAttachments property is false, objectIds property only accepts a single objectId.

See also

Constructors

AttachmentQuery Constructor new AttachmentQuery(properties)

Parameter

properties Object

optional

See the properties for a list of all the properties that may be passed into the constructor.

Property Overview

Any properties can be set, retrieved or listened to. See the Watch for changes topic.

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Type	Summary	Class
String []	The file format that is supported by query attachment.	AttachmentQuery
String	The where clause to be applied to attachment queries.	AttachmentQuery
Boolean	Indicates if the service should cache the attachment query results.	AttachmentQuery
String	The name of the class.	Accessor
String []	An array of globalIds for the features in the layer being queried.	AttachmentQuery
String []	Used to query for attachments that match the provided `keywords`.	AttachmentQuery
String	Used to query for attachments that match this `name`.	AttachmentQuery
Number	The number of features to retrieve.	AttachmentQuery
Number []	An array of objectIds of the features to be queried for attachments.	AttachmentQuery
Boolean	If `true`, the Exchangeable image file format for the attachment will be included in attachmentInfo.	AttachmentQuery
Number []	The file size of the attachment is specified in bytes.	AttachmentQuery
Number	This option fetches query results by skipping a specified number of records.	AttachmentQuery
String	The `where` clause to be applied to the layer.	AttachmentQuery

Property Details

attachmentTypes Property attachmentTypes String[]

The file format that is supported by query attachment. For example, image/jpeg. See the ArcGIS REST API documentation for more information on supported attachment types.

Requires an ArcGIS Server service 10.5 or greater and feature layer's capabilities.query.supportsAttachments to be true.

attachmentsWhere Property attachmentsWhere String

The where clause to be applied to attachment queries. Only attachments that satisfy the attachmentsWhere clause will be returned.

Example

const query = new AttachmentQuery({
  where: "1=1", // query all features in the layer
  attachmentsWhere: "keywords = 'ladybug, purple'" // attachment queries
});

cacheHint Property cacheHint Boolean Since: ArcGIS Maps SDK for JavaScript 4.24 AttachmentQuery since 4.20, cacheHint added at 4.24.

Indicates if the service should cache the attachment query results. It only applies if the layer's capabilities.attachment.supportsCacheHint is set to true. Use only for queries that have the same parameters every time the app is used. Some examples of cacheable queries:

Queries based on preset input, for example, a drop-down list of US states.
Queries based on preset extents, for example bookmarks, in web maps.

Default Value:undefined

declaredClass Inherited Property declaredClass Stringreadonly Inherited from Accessor

The name of the class. The declared class name is formatted as esri.folder.className.

globalIds Property globalIds String[]

An array of globalIds for the features in the layer being queried. The query results will return attachments only for specified global ids.

Requires an ArcGIS Server service 10.5 or greater and feature layer's capabilities.query.supportsAttachments to be true.

keywords Property keywords String[]

Used to query for attachments that match the provided keywords.

Examples

const query = new AttachmentQuery({
  where: "1=1", // query all features in the layer
  attachmentsWhere: "keywords = 'ladybug, purple'" // attachment queries
});

const query = new AttachmentQuery({
  where: "1=1", // query all features in the layer
  attachmentsWhere: "keywords like 'buildings%'" // attachment queries
});

name Property name String

Used to query for attachments that match this name.

Example

const query = new AttachmentQuery({
  where: "1=1", // query all features in the layer
  attachmentsWhere: "name = 'ladybug.png'" // attachment queries
});

num Property num Number

The number of features to retrieve. This option should be used in conjunction with the start property. Use this to implement paging (i.e. to retrieve "pages" of results when querying). Default Value is 10.

If not provided, but an instance of AttachmentQuery has a start property, then the default value of num is maxRecordCount. The maximum value for this parameter is the value of the layer's maxRecordCount of the service, which can be found at the REST endpoint of the feature layer.

Requires an ArcGIS Server service 10.5 or greater and feature layer's capabilities.query.supportsAttachments to be true.

objectIds Property objectIds Number[]

An array of objectIds of the features to be queried for attachments. When the feature layer's capabilities.query.supportsAttachments property is false, it only accepts a single objectId.

returnMetadata Property returnMetadata Boolean

If true, the Exchangeable image file format for the attachment will be included in attachmentInfo. The layer's capabilities.attachment.supportsExifInfo must be true for the attachment query to return exifInfo for the attachments.

Default Value:false

size Property size Number[]

The file size of the attachment is specified in bytes. You can enter a file size range [1000,15000] to query for attachments. The query result will return all attachments within the specified file size range (1000 - 15000).

Requires an ArcGIS Server service 10.5 or greater and feature layer's capabilities.query.supportsAttachments to be true.

start Property start Number

This option fetches query results by skipping a specified number of records. The query results start from the next record. The default value is 0. This parameter only applies when the feature layer's capabilities.query.supportsPagination is true. You can use this option to fetch records that are beyond maxRecordCount.

Requires an ArcGIS Server service 10.5 or greater and feature layer's capabilities.query.supportsAttachments to be true.

where Property where String

The where clause to be applied to the layer. Only features that satisfy the where clause and are in the list of objectIds will be returned. Requires an ArcGIS Server service 10.5 or greater and feature layer's capabilities.query.supportsAttachments to be true.

Method Overview

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Return Type	Summary	Class
	Adds one or more handles which are to be tied to the lifecycle of the object.	Accessor
AttachmentQuery	Creates a deep clone of AttachmentQuery object.	AttachmentQuery
*	Creates a new instance of this class and initializes it with values from a JSON object generated from an ArcGIS product.	AttachmentQuery
Boolean	Returns true if a named group of handles exist.	Accessor
	Removes a group of handles owned by the object.	Accessor
Object	Converts an instance of this class to its ArcGIS portal JSON representation.	AttachmentQuery

Method Details

addHandles Inherited Method addHandles(handleOrHandles, groupKey) Inherited from Accessor Since: ArcGIS Maps SDK for JavaScript 4.25 Accessor since 4.0, addHandles added at 4.25.

Adds one or more handles which are to be tied to the lifecycle of the object. The handles will be removed when the object is destroyed.

// Manually manage handles
const handle = reactiveUtils.when(
  () => !view.updating,
  () => {
    wkidSelect.disabled = false;
  },
  { once: true }
);

this.addHandles(handle);

// Destroy the object
this.destroy();

Parameters

handleOrHandles WatchHandle|WatchHandle []

Handles marked for removal once the object is destroyed.

groupKey *

optional

Key identifying the group to which the handles should be added. All the handles in the group can later be removed with Accessor.removeHandles(). If no key is provided the handles are added to a default group.

clone Method clone(){AttachmentQuery}

Creates a deep clone of AttachmentQuery object.

Returns

Type	Description
AttachmentQuery	A new instance of a AttachmentQuery object equal to the object used to call `.clone()`.

fromJSON Method fromJSON(json){*}static

Creates a new instance of this class and initializes it with values from a JSON object generated from an ArcGIS product. The object passed into the input json parameter often comes from a response to a query operation in the REST API or a toJSON() method from another ArcGIS product. See the Using fromJSON() topic in the Guide for details and examples of when and how to use this function.

Parameter

json Object

A JSON representation of the instance in the ArcGIS format. See the ArcGIS REST API documentation for examples of the structure of various input JSON objects.

Returns

Type	Description
*	Returns a new instance of this class.

hasHandles Inherited Method hasHandles(groupKey){Boolean} Inherited from Accessor Since: ArcGIS Maps SDK for JavaScript 4.25 Accessor since 4.0, hasHandles added at 4.25.

Returns true if a named group of handles exist.

Parameter

groupKey *

optional

A group key.

Returns

Type	Description
Boolean	Returns `true` if a named group of handles exist.

Example

// Remove a named group of handles if they exist.
if (obj.hasHandles("watch-view-updates")) {
  obj.removeHandles("watch-view-updates");
}

removeHandles Inherited Method removeHandles(groupKey) Inherited from Accessor Since: ArcGIS Maps SDK for JavaScript 4.25 Accessor since 4.0, removeHandles added at 4.25.

Removes a group of handles owned by the object.

Parameter

groupKey *

optional

A group key or an array or collection of group keys to remove.

Example

obj.removeHandles(); // removes handles from default group

obj.removeHandles("handle-group");
obj.removeHandles("other-handle-group");

toJSON Method toJSON(){Object}

Converts an instance of this class to its ArcGIS portal JSON representation. See the Using fromJSON() guide topic for more information.

Returns

Type	Description
Object	The ArcGIS portal JSON representation of an instance of this class.