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Handle subgraph schema field with derivedFrom directive (#60)

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* Handle subgraph schema field with derivedFrom directive

* Handle derivedFrom directive in eden-watcher

* Fix 1 to N relation error by removing limit from query

* Order by id for derivedFrom relations to match graph-node

* Refactor example subgraph schema entities

* Fix watcher queries to return correct relation field values

* Fix hierarchical query for getting two entities at same block
This commit is contained in:
nabarun
2021-12-28 16:08:05 +05:30
committed by nabarun
parent b04f6f2fba
commit 238ad21189
26 changed files with 482 additions and 376 deletions
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packages/graph-node/test/subgraph/example1/src/mapping.ts
+37 -35
View File
@@ -4,7 +4,7 @@ import {
Example1,
Test
} from '../generated/Example1/Example1';
import { ExampleEntity, ManyRelatedEntity, RelatedEntity } from '../generated/schema';
import { Author, Blog, Category } from '../generated/schema';
export function handleTest (event: Test): void {
log.debug('event.address: {}', [event.address.toHexString()]);
@@ -15,52 +15,54 @@ export function handleTest (event: Test): void {
// Entities can be loaded from the store using a string ID; this ID
// needs to be unique across all entities of the same type
let entity = ExampleEntity.load(event.transaction.from.toHex());
let author = Author.load(event.transaction.from.toHex());
// Entities only exist after they have been saved to the store;
// `null` checks allow to create entities on demand
if (!entity) {
entity = new ExampleEntity(event.transaction.from.toHex());
if (!author) {
author = new Author(event.transaction.from.toHex());
// Entity fields can be set using simple assignments
entity.count = BigInt.fromString('0');
author.blogCount = BigInt.fromString('0');
}
// BigInt and BigDecimal math are supported
entity.count = entity.count + BigInt.fromString('1');
author.blogCount = author.blogCount + BigInt.fromString('1');
// Entity fields can be set based on event parameters
entity.paramString = event.params.param1;
entity.paramInt = event.params.param2;
entity.paramBoolean = true;
entity.paramBytes = event.address;
entity.paramEnum = 'choice1';
entity.paramBigDecimal = BigDecimal.fromString('123');
let relatedEntity = RelatedEntity.load(event.params.param1);
if (!relatedEntity) {
relatedEntity = new RelatedEntity(event.params.param1);
relatedEntity.paramBigInt = BigInt.fromString('123');
}
const bigIntArray = relatedEntity.bigIntArray;
bigIntArray.push(entity.count);
relatedEntity.bigIntArray = bigIntArray;
relatedEntity.save();
entity.related = relatedEntity.id;
const manyRelatedEntity = new ManyRelatedEntity(event.transaction.hash.toHexString());
manyRelatedEntity.count = entity.count;
manyRelatedEntity.save();
const manyRelated = entity.manyRelated;
manyRelated.push(manyRelatedEntity.id);
entity.manyRelated = manyRelated;
author.name = event.params.param1;
author.paramInt = event.params.param2;
author.paramBytes = event.address;
author.rating = BigDecimal.fromString('4');
// Entities can be written to the store with `.save()`
entity.save();
author.save();
let category = Category.load(author.blogCount.toString());
if (!category) {
category = new Category(author.blogCount.toString());
category.name = event.params.param1;
}
category.count = category.count + BigInt.fromString('1');
category.save();
const blog = new Blog(event.transaction.hash.toHexString());
blog.kind = 'long';
blog.isActive = true;
const blogReviews = blog.reviews;
blogReviews.push(BigInt.fromString('4'));
blog.reviews = blogReviews;
blog.author = author.id;
const categories = blog.categories;
categories.push(category.id);
blog.categories = categories;
blog.save();
const contractAddress = dataSource.address();
const contract = Example1.bind(contractAddress);