# Get-ERPEntityTypes

Cmdlet to retrieve metadata informations about EntityTypes.

## Syntax

```{code-block} powershell
:linenos: true

Get-ERPEntityTypes [[-Service] <String>] [[-EntitySet] <String>] [<CommonParameters>]
```

## Parameters

| Type   | Name      | Description                                           | Optional |
|--------|-----------|-------------------------------------------------------|----------|
| String | Service   | Retrieve all EntityTypes from the specified service   | yes      |
| String | EntitySet | Retrieve all EntityTypes from the specified entitySet | yes      |


## Return type

[EntityType](</code_reference/commandlets/objects/entitytype>) **\[\]** ← on success\
**empty array** ← on failure. Exception/ErrorMessage can be accessed using [\$Error](<https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_automatic_variables?view=powershell-5.1#error>).

## Remarks

When calling the Get-ERPEntityTypes without arguments the EntityTypes of all available services are returned.

## Examples

In the following examples we are using public OData Services (<http://services.odata.org>) for demonstration purposes:

**Getting all available EntityTypes**

```{code-block} powershell
:linenos: true

Get-ERPEntityTypes
```

**Getting all EntityTypes from the specified Service "OData.svc"**

```{code-block} powershell
:linenos: true

$entityTypes = Get-ERPEntityTypes -Service "OData.svc"
$entityTypes #returns Products, Persons...
```

**Getting all available EntityTypes from the EntitySet "Customers"**

```{code-block} powershell
:linenos: true

$entityTypes = Get-ERPEntityTypes -EntitySet "Customers"
$entityTypes[0].Name #returns Customer
```

**Error handling: Check if an error appeared by using [\$?](<https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_automatic_variables?view=powershell-5.1#section-1>) and analyze the [WebRequestException](</code_reference/net_library/webrequestexception>) to understand why the error occurred, by using \$Error:**

```{code-block} powershell
:linenos: true

$entityTypes = Get-ERPEntityTypes -Service "SomeService"

if(-not $entityTypes){
        if($? -eq $false){
                $Error[0].Exception #Could not find any service for: 'SomeService'
        }
        else{
                Write-Host("The Service 'SomeService' does not have any EntityTypes!")
        }
}
```