See the video for detailed code explanations and QA with community: https://www.youtube.com/watch?v=1Y3pQUkpqQ0
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.
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
It's useful to know aws stores your credentials at ~/.aws/credentials
use cat ~/.aws/credentials to see them
_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