Serverless: Validation error ... Member must satisfy regular expression pattern: tablename - amazon-web-services

Question

I am trying to deploy a serverless app on AWS cloud formation but I am getting a regular expression pattern error
Error:
CREATE_FAILED: UsersDynamoDBTable (AWS::DynamoDB::Table)
1 validation error detected:Value 'users-table-dev'' at 'tableName' failed to satisfy constraint: Member must satisfy regular expression pattern: [a-zA-Z0-9_.-]+** (Service: AmazonDynamoDBv2; Status Code: 400; Error Code: ValidationException; Request ID: 9OBFJ6RG2SKVIE58UTVAMNV7V7VV4KQNSO5AEMVJF66Q9ASUAAJG; Proxy: null)
What I can do to fix this?
# serverless.yml
service: serverless-flask
plugins:
- serverless-python-requirements
- serverless-wsgi
custom:
tableName: 'users-table-${self:provider.stage}'
wsgi:
app: app.app
packRequirements: false
pythonRequirements:
dockerizePip: non-linux
provider:
name: aws
runtime: python3.6
stage: dev
region: us-east-1
iamRoleStatements:
- Effect: Allow
Action:
- dynamodb:Query
- dynamodb:Scan
- dynamodb:GetItem
- dynamodb:PutItem
- dynamodb:UpdateItem
- dynamodb:DeleteItem
Resource:
- { "Fn::GetAtt": ["UsersDynamoDBTable", "Arn" ] }
environment:
USERS_TABLE: ${self:custom.tableName}
functions:
app:
handler: wsgi.handler
events:
- http: ANY /
- http: 'ANY {proxy+}'
resources:
Resources:
UsersDynamoDBTable:
Type: 'AWS::DynamoDB::Table'
Properties:
AttributeDefinitions:
-
AttributeName: userId
AttributeType: S
KeySchema:
-
AttributeName: userId
KeyType: HASH
ProvisionedThroughput:
ReadCapacityUnits: 1
WriteCapacityUnits: 1
TableName: ${self:custom.tableName}
I am trying to implement the code here build a rest api with serverless lambda dynamo

Answer 1

For anybody experiencing the same issue, take a look at the tableName property. Instead of having the single quotes the line should look like that
tableName: `users-table-${self:provider.stage}`
Had the same minor error, it is easy to be overlooked.