Update data without manually property setter in DataStore using AWS Amplify with angular-CodePudding

I used aws-amplify for a very short time for my project. Recently, I'm facing a serious issue about data updating in DataStore in aws-amplify. After reading the docs from their official site I findout that, If I want to update data in DataStore it worked in Immutable way like this,

For creating data,

await DataStore.save(
  new Post({
    title: "My First Post",
    rating: 10,
    status: PostStatus.DRAFT
  })
);

and for updating data ,

const original = await DataStore.query(Post, "123");

await DataStore.save(
  Post.copyOf(original, updated => {
    updated.title = `Any Title`;
  })
);

there is no issue with creation but when I goes with update this line is a pain if you have more than 20 property in your object model. Because you have to write all those property and update with it .

updated.title = `Any Title`;

So, I want to update like this without writing all the property in manually,

const updatedTestResult = { ...this.testResult, ...this.testResultForm.value };
var result = await DataStore.save(TestResult.copyOf(this.testResult, updatedTestResult))

now it showing me this error,

TypeError: fn is not a function
    at datastore.js:376:17
    at produce (immer.esm.js:1:16034)
    at Model.copyOf (datastore.js:375:32)
    at test-result-form.component.ts:130:41
    at Generator.next (<anonymous>)
    at asyncGeneratorStep (asyncToGenerator.js:3:1)
    at _next (asyncToGenerator.js:25:1)
    at asyncToGenerator.js:32:1
    at new ZoneAwarePromise (zone.js:1427:29)
    at asyncToGenerator.js:21:1

or maybe there have another solution. Can you please me on that ?

CodePudding user response：

I believe, copyOf function takes 2 parameters, 1st one is object and 2nd is callback. so, u can do something like this

await DataStore.save(
  Post.copyOf(original, updated => {
    ...updated, ...this.testResultForm.value
  })
);

CodePudding user response：

Do you have a more accurate representation of your code for suggestions?