Azure Function and PowerShell: unable to set connection strings with Set-AzWebApp - entity-framework

Question

For deployment purposes I created a PowerShell script to set App Settings. This works fine via
$currentAppSettings = $app.SiteConfig.AppSettings
$appSettings = #{}
# Add existing App Settings
ForEach ($currentAppSetting in $currentAppSettings) {
$appSettings[$currentAppSetting.Name] = $currentAppSetting.Value
}
# Add new App Settings
$appSettings["someKey"] = "someValue"
# Update App Settings
Set-AzWebApp -ResourceGroupName $resourceGroupName -Name $appName -AppSettings $appSettings
As I am using now Entity Framework I also need to set the Connection Strings. First I thought this should work like with App Settings and just adding the ConnectionStrings Argument:
$currentConnectionStrings = $app.SiteConfig.ConnectionStrings
$connectionStrings = #{}
ForEach ($currentConnectionString in $currentConnectionStrings) {
$connectionStrings[$currentConnectionString.Name] = $currentConnectionString.ConnectionString
}
$connectionStrings["someKey"] = "someValue"
Set-AzWebApp -ResourceGroupName $resourceGroupName -Name $appName -ConnectionStrings $connectionStrings
But this fails with the error
Set-AzWebApp : Cannot validate argument on parameter 'ConnectionStrings'. Connection string type value pair must be of type 'System.Collections.Hashtable'
despite the fact that $connectionStrings is of type System.Collections.Hashtable
Also trying to work with Custom Objects, arrays and so on failed.
How do I pass the connection strings correctly?
And how do I specify the Type (e.g. SQLAZURE)?
Thanks

Answer 1

As per the Documentation of Set-AzwebApp ConnectionStrings should be Hastable.
Set-AzWebApp
[[-AppServicePlan] <String>]
[[-DefaultDocuments] <String[]>]
[[-NetFrameworkVersion] <String>]
[[-PhpVersion] <String>]
[[-RequestTracingEnabled] <Boolean>]
[[-HttpLoggingEnabled] <Boolean>]
[[-DetailedErrorLoggingEnabled] <Boolean>]
[[-AppSettings] <Hashtable>]
[[-ConnectionStrings] <Hashtable>]
[[-HandlerMappings] <System.Collections.Generic.IList`1[Microsoft.Azure.Management.WebSites.Models.HandlerMapping]>]
[[-ManagedPipelineMode] <String>]
[[-WebSocketsEnabled] <Boolean>]
[[-Use32BitWorkerProcess] <Boolean>]
[[-AutoSwapSlotName] <String>]
[-ContainerImageName <String>]
[-ContainerRegistryUrl <String>]
[-ContainerRegistryUser <String>]
[-ContainerRegistryPassword <SecureString>]
[-EnableContainerContinuousDeployment <Boolean>]
[-HostNames <String[]>]
[-NumberOfWorkers <Int32>]
[-AsJob]
[-AssignIdentity <Boolean>]
[-HttpsOnly <Boolean>]
[-AzureStoragePath <WebAppAzureStoragePath[]>]
[-ResourceGroupName] <String>
[-Name] <String>
[-DefaultProfile <IAzureContextContainer>]
[<CommonParameters>]
You should set connectionstring using a Hashtable as shown below:
$connectionStrings = #{connectionStrings = #{Name="<ConnectionStringName>";Value="<ConnectionSyring>";type="<SQLAzure/SQLServer/Custom/MySql>"}}
Set-AzWebApp -ResourceGroupName $resourceGroupName -Name $appName -ConnectionStrings $connectionStrings

Answer 2

#KetanChawda-MSFT: Thanks for your advice, it helped me a lot to develop the solution (but did not work as such in my context as mentioned below).
Here is the way it works for me now:
$currentConnectionStrings = $app.SiteConfig.ConnectionStrings
$connectionStrings = #{}
# Add existing connection strings
ForEach ($currentConnectionString in $currentConnectionStrings) {
$connectionStrings[$currentConnectionString.Name] =
#{
Value=$currentConnectionString.ConnectionString;
Type=($currentConnectionString.Type | Out-String).ToUpper()
}
}
# Add database connection string
$connectionStrings["connName"] = #{
Value="connString";
Type="SQLAZURE"
}
# Update settings
Set-AzWebApp -ResourceGroupName $resourceGroupName -Name $appName -ConnectionStrings $connectionStrings
What is interesting is that in case of existing connection strings I have to format it as string and use toUpper, otherwise it does not work for me (Error: Set-AzWebApp : Cannot validate argument on parameter 'ConnectionStrings'. Connection string type must be specified.). When adding a new connection string I can use e.g. SQLAZURE as well as SQLAzure.
EDIT:
Here is an approach where you don't need the connection strings section at all when working with Entity Framework and Azure Functions: Missing ProviderName when debugging AzureFunction as well as deploying azure function