Ref API-ID in Serverless.Template

Hi guys

I would like to be able to reference the api-id in serverless.template when an Api Gateway endpoint is created. I am creating a serverless app (see below)

` "BesoftwareTestGraphQLApi": {
"Type": "AWS::Serverless::Function",
"Properties": {
"FunctionName": "BesoftwareTestGraphQL",
"Handler": "BesoftwareTest.Services::BesoftwareTest.Services.LambdaEntryPoint::FunctionHandlerAsync",
"Runtime": "dotnetcore2.1",
"Tracing": "Active",
"CodeUri": "",
"MemorySize": 1024,
"Timeout": 30,
"Role": { "Ref": "PRole" },
"Policies": [ "AWSLambdaFullAccess" ],
"Environment": {
"Variables": {
"ASPNETCORE_ENVIRONMENT": { "Ref": "PEnvironment" }
}
},
"Events": {
"PostResource": {
"Type": "Api",
"Properties": {
"Path": "/graphql",
"Method": "POST"
}
}
},
"VpcConfig": {
"SecurityGroupIds": [
{ "Ref": "PSecurityGroupId" }
],
"SubnetIds": [
{ "Ref": "PSubnetId1" },
{ "Ref": "PSubnetId2" },
{ "Ref": "PSubnetId3" }
]
}
}
},`

and I am creating a custom domain (see below)

` "APIDomainName": {
"Type": "AWS::ApiGateway::DomainName",
"Properties": {
"CertificateArn": "**********************************************************",
"DomainName": "bsapistage.mcdevelop.com" ,
"EndpointConfiguration": {
"Types": [ "EDGE" ]
}
}
},`

and BasePathMapping (see below)

` "APIBasePathMapping": {
"Type": "AWS::ApiGateway::BasePathMapping",
"Properties": {
"DomainName": "bsapistage.mcdevelop.com",
"RestApiId": { [NOTHING FITS HERE] },
"Stage": "Stage"
}
},`

I need to get the api-id of the generated api gateway endpoint and use it as the RestApiId of BasePathMapping. However, I cannot find away to get this value. Can you point me in the right direction please?

TIA

Start by tracing how serverless.template turns the AWS::Serverless::Function Api event into an API Gateway resource. Review the generated API Gateway resources and the AWS::ApiGateway::BasePathMapping configuration shown in the issue. Done means the template can reference the generated API ID as RestApiId for the custom domain mapping, with behavior verified by the relevant project tests or deployment flow.

Written by the indexing model from the issue text.