运行无服务器部署时出现无服务器 .yml 错误

Question

我收到错误：“无法解析 serverless.yml：变量解析出错：

• 无法解析“resources.Resources.ClientsTable.Properties.TableName”处的变量：当我尝试在无服务器项目上运行纱线部署命令时，在“self”源处找不到值。

我希望有人能为我指出正确的方向，因为我不确定为什么无法解析 TableName 属性。

谢谢，

泰特美术馆

# Welcome to Serverless!
#
# This file is the main config file for your service.
# It's very minimal at this point and uses default values.
# You can always add more config options for more control.
# We've included some commented out config examples here.
# Just uncomment any of them to get that config option.
#
# For full config options, check the docs:
#    docs.serverless.com
#
# Happy Coding!

service: auto-garden-server
# app and org for use with dashboard.serverless.com
#app: your-app-name
#org: your-org-name

# You can pin your service to only deploy with a specific Serverless version
# Check out our docs for more details
frameworkVersion: "3"

provider:
  name: aws
  runtime: nodejs12.x
  lambdaHashingVersion: 20201221
  stage: ${opt:stage, 'dev'}

region: ca-central-1

iam:
  role:
    statements:
      - Effect: Allow
        Action:
          - "dynamodb:PutItem"
          - "dynamodb:DeleteItem"
          - "dynamodb:Scan"
        Resource: 
          - { "Fn::GetAtt": ["ClientsTable", "Arn"] }

environment:
  CLIENTS_TABLE_NAME: ${self:provider.stage}WSClients
  WSSAPIGATEWAYENPOINT:
    Fn::Join:
      - ""
      - - "https://"
        - Ref: WebsocketsApi
        - ".execute-api"
        - Ref: AWS::Region
        - ".amazonaws.com/${sls:stage}"

functions:
  websocketHandler:
    handler: src/handlers.handle
    events:
      - websocket:
          route: $connect
      - websocket:
          route: $disconnect
      - websocket:
          route: $msg

plugins:
  - serverless-plugin-typescript

resources:
  Resources:
    ClientsTable:
      Type: AWS::DynamoDB::Table
      Properties:
        TableName: ${self:provider.environment.CLIENTS_TABLE_NAME}
        ProvisionedThroughput:
          ReadCapacityUnits: 1
          WriteCapacityUnits: 1
        AttributeDefinitions:
          - AttributeName: connectionId
            AttributeType: S
        KeySchema:
          - AttributeName: connectionId
            KeyType: HASH

我正在学习教程，但不确定如何处理此错误。我仔细检查了语法。

Answer 1

您的环境部分似乎位于错误的位置。 它应该如下所示：

provider:
  name: aws
  runtime: nodejs12.x
  lambdaHashingVersion: 20201221
  stage: ${opt:stage, 'dev'}
  environment:
    CLIENTS_TABLE_NAME: ${self:provider.stage}WSClients
    WSSAPIGATEWAYENPOINT:
      Fn::Join:
        - ""
        - - "https://"
          - Ref: WebsocketsApi
          - ".execute-api"
          - Ref: AWS::Region
          - ".amazonaws.com/${sls:stage}"

这将修复您的错误，并自动将此环境变量包含在您的所有 lambda 函数中。