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Load relations sequentially (#212)

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nikugogoi 2022-11-03 14:32:34 +05:30 committed by GitHub
parent 2517f110ea
commit be65ca45ea
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1 changed files with 113 additions and 114 deletions
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227
packages/graph-node/src/database.ts
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@ -632,118 +632,21 @@ export class Database {
return entities; return entities;
} }
const relationPromises = selections.filter((selection) => selection.kind === 'Field' && Boolean(relations[selection.name.value])) const relationSelections = selections.filter((selection) => selection.kind === 'Field' && Boolean(relations[selection.name.value]));
.map(async selection => {
assert(selection.kind === 'Field');
const field = selection.name.value;
const { entity: relationEntity, isArray, isDerived, field: foreignKey } = relations[field];
let childSelections = selection.selectionSet?.selections || [];
// Filter out __typename field in GQL for loading relations. for (const selection of relationSelections) {
childSelections = childSelections.filter(selection => !(selection.kind === 'Field' && selection.name.value === '__typename')); assert(selection.kind === 'Field');
const field = selection.name.value;
const { entity: relationEntity, isArray, isDerived, field: foreignKey } = relations[field];
let childSelections = selection.selectionSet?.selections || [];
if (isDerived) { // Filter out __typename field in GQL for loading relations.
const where: Where = { childSelections = childSelections.filter(selection => !(selection.kind === 'Field' && selection.name.value === '__typename'));
[foreignKey]: [{
value: entities.map((entity: any) => entity.id),
not: false,
operator: 'in'
}]
};
const relatedEntities = await this.getEntities(
queryRunner,
relationEntity,
relationsMap,
block,
where,
{},
childSelections
);
const relatedEntitiesMap = relatedEntities.reduce((acc: {[key:string]: any[]}, entity: any) => {
// Related entity might be loaded with data.
const parentEntityId = entity[foreignKey].id ?? entity[foreignKey];
if (!acc[parentEntityId]) {
acc[parentEntityId] = [];
}
if (acc[parentEntityId].length < DEFAULT_LIMIT) {
acc[parentEntityId].push(entity);
}
return acc;
}, {});
entities.forEach((entity: any) => {
if (relatedEntitiesMap[entity.id]) {
entity[field] = relatedEntitiesMap[entity.id];
} else {
entity[field] = [];
}
});
return;
}
if (isArray) {
const relatedIds = entities.reduce((acc: Set<string>, entity: any) => {
entity[field].forEach((relatedEntityId: string) => acc.add(relatedEntityId));
return acc;
}, new Set());
const where: Where = {
id: [{
value: Array.from(relatedIds),
not: false,
operator: 'in'
}]
};
const relatedEntities = await this.getEntities(
queryRunner,
relationEntity,
relationsMap,
block,
where,
{},
childSelections
);
entities.forEach((entity: any) => {
const relatedEntityIds: Set<string> = entity[field].reduce((acc: Set<string>, id: string) => {
acc.add(id);
return acc;
}, new Set());
entity[field] = [];
relatedEntities.forEach((relatedEntity: any) => {
if (relatedEntityIds.has(relatedEntity.id) && entity[field].length < DEFAULT_LIMIT) {
entity[field].push(relatedEntity);
}
});
});
return;
}
// field is neither an array nor derivedFrom
if (childSelections.length === 1 && childSelections[0].kind === 'Field' && childSelections[0].name.value === 'id') {
// Avoid loading relation if selections only has id field.
entities.forEach((entity: any) => {
entity[field] = { id: entity[field] };
});
return;
}
if (isDerived) {
const where: Where = { const where: Where = {
id: [{ [foreignKey]: [{
value: entities.map((entity: any) => entity[field]), value: entities.map((entity: any) => entity.id),
not: false, not: false,
operator: 'in' operator: 'in'
}] }]
@ -759,20 +662,116 @@ export class Database {
childSelections childSelections
); );
const relatedEntitiesMap = relatedEntities.reduce((acc: {[key:string]: any}, entity: any) => { const relatedEntitiesMap = relatedEntities.reduce((acc: {[key:string]: any[]}, entity: any) => {
acc[entity.id] = entity; // Related entity might be loaded with data.
const parentEntityId = entity[foreignKey].id ?? entity[foreignKey];
if (!acc[parentEntityId]) {
acc[parentEntityId] = [];
}
if (acc[parentEntityId].length < DEFAULT_LIMIT) {
acc[parentEntityId].push(entity);
}
return acc; return acc;
}, {}); }, {});
entities.forEach((entity: any) => { entities.forEach((entity: any) => {
if (relatedEntitiesMap[entity[field]]) { if (relatedEntitiesMap[entity.id]) {
entity[field] = relatedEntitiesMap[entity[field]]; entity[field] = relatedEntitiesMap[entity.id];
} else {
entity[field] = [];
} }
}); });
});
await Promise.all(relationPromises); continue;
}
if (isArray) {
const relatedIds = entities.reduce((acc: Set<string>, entity: any) => {
entity[field].forEach((relatedEntityId: string) => acc.add(relatedEntityId));
return acc;
}, new Set());
const where: Where = {
id: [{
value: Array.from(relatedIds),
not: false,
operator: 'in'
}]
};
const relatedEntities = await this.getEntities(
queryRunner,
relationEntity,
relationsMap,
block,
where,
{},
childSelections
);
entities.forEach((entity: any) => {
const relatedEntityIds: Set<string> = entity[field].reduce((acc: Set<string>, id: string) => {
acc.add(id);
return acc;
}, new Set());
entity[field] = [];
relatedEntities.forEach((relatedEntity: any) => {
if (relatedEntityIds.has(relatedEntity.id) && entity[field].length < DEFAULT_LIMIT) {
entity[field].push(relatedEntity);
}
});
});
continue;
}
// field is neither an array nor derivedFrom
if (childSelections.length === 1 && childSelections[0].kind === 'Field' && childSelections[0].name.value === 'id') {
// Avoid loading relation if selections only has id field.
entities.forEach((entity: any) => {
entity[field] = { id: entity[field] };
});
continue;
}
const where: Where = {
id: [{
value: entities.map((entity: any) => entity[field]),
not: false,
operator: 'in'
}]
};
const relatedEntities = await this.getEntities(
queryRunner,
relationEntity,
relationsMap,
block,
where,
{},
childSelections
);
const relatedEntitiesMap = relatedEntities.reduce((acc: {[key:string]: any}, entity: any) => {
acc[entity.id] = entity;
return acc;
}, {});
entities.forEach((entity: any) => {
if (relatedEntitiesMap[entity[field]]) {
entity[field] = relatedEntitiesMap[entity[field]];
}
});
}
return entities; return entities;
} }