Purpose

• The $select parameter allows you to specify which properties of a resource should be included in the response.

Key Points

• You can include specific properties of any resource by listing them in the $select expression.
• This helps reduce the amount of data returned, improving performance.
• The properties must be specified by name and must match those defined in the metadata.

Syntax of $select Expression

• The expression follows the format:

PROPERTY1_NAME, PROPERTY2_NAME

• This means you can list multiple properties separated by commas.

prod_ref, prod_title

Supported Properties

• The list of available properties for the Product resource can be found in the JSON schema returned by the /$metadata endpoints.
• Example: When making a request to /Products/$metadata, you will get a schema detailing all available properties like prod_title, prod_ref, etc.

How to Use $select in a Request

• When constructing your API request, add the $select parameter to specify the fields you want to retrieve.

http://api2.saleslayer.com/rest/Catalog/Products?$select=prod_ref,prod_title

Response Format

• When you use $select, the response will only contain the specified properties, making it more concise and efficient.

{
    "value": [
        {
            "prod_ref": "MyPer",
            "prod_title": {
                "en": "My Personify"
            }
        },
        {
            "prod_ref": "CuMoApp",
            "prod_title": {
                "en": "Custom Mobile Apps"
            }
        },
        {
            "prod_ref": "Atrius",
            "prod_title": {
                "en": "Atrius"
            }
        },
        {
            "prod_ref": "Builder",
            "prod_title": {
                "en": "Builder"
            }
        },
        {
            "prod_ref": "X-pressP",
            "prod_title": {
                "en": "X-press gfx Points"
            }
        },
        {
            "prod_ref": "EC-gfx",
            "prod_title": {
                "en": "EC-gfxProgram"
            }
        },
        {
            "prod_ref": "PreApp",
            "prod_title": {
                "en": "Preloaded Applications"
            }
        },
        {
            "prod_ref": "ProdEnhanT",
            "prod_title": {
                "en": "Productivity Enhancing Tools"
            }
        },
        {
            "prod_ref": "ECx-L-4D",
            "prod_title": {
                "en": "ECx-Light-4DALI"
            }
        },
        {
            "prod_ref": "ECx-L-S",
            "prod_title": {
                "en": "ECx-Light Series"
            }
        },
        {
            "prod_ref": "ECx-B-S",
            "prod_title": {
                "en": "ECx-Blind Series"
            }
        }
    ],
    "@count": 11,
    "@readLink": "https://api2.saleslayer.com/rest/Catalog/Products?$select=[prod_ref,prod_title]"
}

Notes

• The $select parameter is a powerful tool for reducing the size of the response, especially when you're working with large datasets.
• You should always refer to the metadata endpoint (e.g., /Products/$metadata) to confirm which properties are available for the resources you're working with.