Question: I can't select look up field in my SharePoint 2013 List.
also I can't filter base on a Look up field.

for example I have List with Name Test and this list has fields: Title, Company, Province
the Company and Province is look up fields I want to filter based on Province which is a look up field
using REST query it gives error:

my query: 

```
https://TestServer/sites/AIB/OBC/_api/web/lists/getByTitle('Test')/items?$select=Province/Title&$expand=Province&$filter=Province/Title eq 'ABC'

```

it gives error when I put the URL in My browser for testing it gives the blow error:

```
<m:message xml:lang="en-US">The field or property 'Province' does not exist.</m:message>

```

How to filter based on a look up field in SharePoint 2013 REST ?

Answer: 
How to filter by lookup field value using SharePoint REST
---------------------------------------------------------

Assume a `Contacts` list that contains a lookup field named `Province`

**Option 1**

When a lookup column is being added into list, its `ID` become accessible automatically via REST. For example, when the field named `Province` is added into List, `Province Id` could be set or get via `ProvinceId` property of List Item. 

The following query demonstrate how to filter list items by *lookup field Id* (`Province Id` in our case): 

```
/_api/web/lists/GetByTitle('<list title>')/items?$filter=LookupField eq <ProvinceId>

```

where `<ProvinceId>` is a province id

**Option 2** 

In order to filter by *lookup value*, the query should contain `$expand` query option to retrieve projected fields (like `Province Title`). The following example demonstrates how to filter by *lookup field value* (by `Province Title` in our case): 

```
/_api/web/lists/GetByTitle('Contacts')/items?$select=Province/Title&$expand=Province&$filter=Province/Title eq <ProvinceTitle>

```

where `<ProvinceTitle>` is a `Title` of Province
Use $expand like blow code:

```
/_api/web/lists/GetByTitle('Test')/items?$select=Province/Title&$expand=Province&$filter=Province/Title eq 'XYZ'

```