$expand
Expands an image stored in an Image attribute (e.g., Employee(1)/photo?$imageformat=best&$expand=photo
)
or
Expands an BLOB attribute to save it.
Compatibility: For compatibility reasons, $expand can be used to expand a relational attribute (e.g.,
Company(1)?$expand=staff
orEmployee/?$filter="firstName BEGIN a"&$expand=employer
). It is however recommended to use$attributes
for this feature.
Viewing an image attribute
If you want to view an image attribute in its entirety, write the following:
GET /rest/Employee(1)/photo?$imageformat=best&$version=1&$expand=photo
For more information about the image formats, refer to $imageformat
. For more information about the version parameter, refer to $version
.
Saving a BLOB attribute to disk
If you want to save a BLOB stored in your dataclass, you can write the following by also passing "true" to $binary:
GET /rest/Company(11)/blobAtt?$binary=true&$expand=blobAtt