AppSync Boilerplate using CDK

See the video for detailed code explanations and QA with community: https://www.youtube.com/watch?v=1Y3pQUkpqQ0

Usage

After having an aws account setup and aws cli installed, run yarn deploy It will deploy a basic AppSync server for you using lambda resolvers.

cdk bootstrap

You may encounter an error while deploying about running cdk bootstrap

Run it like this: yarn cdk bootstrap aws://9999999999/us-east-2 --profile <profile here if using>

go to the dashboard to find you account id Replace 9999999999 with it. Replace us-east-2 with the region you're using, this is visible on the dashboard. If using a profile (only if you deploy to multiple aws account) pass profile name after --profile

credentials

It's useful to know aws stores your credentials at ~/.aws/credentials

use cat ~/.aws/credentials to see them

field lambdas

_fieldLambda resolves a model id within another model. Imagine you're liking a post in a social network:

// like model
{
  user: 2382adabc7323bcf
  post: badf738c373bcf
}

Since both strings are ids to other models, you'd create a resolver using _fieldLambda in the Like module

// modules/like
createResolver('Like.user', _fieldLambda)
createResolver('Like.post', _fieldLambda)

_fieldArrayLambda resolves a model id array within another model. Imagine you're saving a users email address, and that email is a model

// user model
{
  emails: [2382adabc7323bcf, badf738c373bcf]
}

You'd create a resolver using _fieldLambda in the Like module

// modules/user
createResolver('User.emails', _fieldArrayLambda)

This allows AppSync to "unwrap" your data into graphQl responses