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feat(NODE-3589): support dot-notation attributes in Filter #2972

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merged 8 commits into from
Dec 17, 2021
Merged

feat(NODE-3589): support dot-notation attributes in Filter #2972

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b0e17e8
feat: support dot-notation attributes in Filter
avaly Sep 6, 2021
f68f71b
test: add some additional tests with comments
nbbeeken Nov 16, 2021
6786a3e
fix: address PR feedback
avaly Nov 16, 2021
8047283
fix: TS 4.5 fixes
avaly Nov 22, 2021
903442a
fix: typescript linting bump one minor version
nbbeeken Dec 3, 2021
70685e0
fix: add support for Map
avaly Dec 16, 2021
eb223d9
Resolve merge conflicts from main
baileympearson Dec 17, 2021
e0996a7
fix: simplify BSON type detection, add regex and function
nbbeeken Dec 17, 2021
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16 changes: 10 additions & 6 deletions .evergreen/run-checks.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -20,12 +20,16 @@ npm run check:lint

npm run check:unit

echo "Typescript $(npx tsc -v)"
export TSC="./node_modules/typescript/bin/tsc"

echo "Typescript $($TSC -v)"
# check resolution uses the default latest types
echo "import * as mdb from '.'" > file.ts && npx tsc --noEmit --traceResolution file.ts | grep 'mongodb.d.ts' && rm file.ts
echo "import * as mdb from '.'" > file.ts && $TSC --noEmit --traceResolution file.ts | grep 'mongodb.d.ts' && rm file.ts

npm i --no-save typescript@4.0.2 # there is no 4.0.0
echo "Typescript $(npx tsc -v)"
npx tsc --noEmit mongodb.ts34.d.ts
npm i --no-save typescript@4.1.6
echo "Typescript $($TSC -v)"
$TSC --noEmit mongodb.ts34.d.ts
# check that resolution uses the downleveled types
echo "import * as mdb from '.'" > file.ts && npx tsc --noEmit --traceResolution file.ts | grep 'mongodb.ts34.d.ts' && rm file.ts
echo "import * as mdb from '.'" > file.ts && $TSC --noEmit --traceResolution file.ts | grep 'mongodb.ts34.d.ts' && rm file.ts

rm -f file.ts
2 changes: 1 addition & 1 deletion README.md
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Expand Up @@ -46,7 +46,7 @@ For version compatibility matrices, please refer to the following links:

#### Typescript Version

We recommend using the latest version of typescript, however we do provide a [downleveled](https://github.com/sandersn/downlevel-dts#readme) version of the type definitions that we test compiling against `typescript@4.0.2`.
We recommend using the latest version of typescript, however we do provide a [downleveled](https://github.com/sandersn/downlevel-dts#readme) version of the type definitions that we test compiling against `typescript@4.1.6`.
Since typescript [does not restrict breaking changes to major versions](https://github.com/Microsoft/TypeScript/wiki/Breaking-Changes) we consider this support best effort.
If you run into any unexpected compiler failures please let us know and we will do our best to correct it.

Expand Down
3 changes: 3 additions & 0 deletions src/index.ts
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Expand Up @@ -283,9 +283,11 @@ export type {
InferIdType,
IntegerType,
IsAny,
Join,
KeysOfAType,
KeysOfOtherType,
MatchKeysAndValues,
NestedPaths,
NonObjectIdLikeDocument,
NotAcceptedFields,
NumericType,
Expand All @@ -295,6 +297,7 @@ export type {
OptionalUnlessRequiredId,
Projection,
ProjectionOperators,
PropertyType,
PullAllOperator,
PullOperator,
PushOperator,
Expand Down
65 changes: 64 additions & 1 deletion src/mongo_types.ts
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Expand Up @@ -66,7 +66,9 @@ export type WithoutId<TSchema> = Omit<TSchema, '_id'>;

/** A MongoDB filter can be some portion of the schema or a set of operators @public */
export type Filter<TSchema> = {
[P in keyof WithId<TSchema>]?: Condition<WithId<TSchema>[P]>;
[Property in Join<NestedPaths<WithId<TSchema>>, '.'>]?: Condition<
PropertyType<WithId<TSchema>, Property>
>;
} & RootFilterOperators<WithId<TSchema>>;

/** @public */
Expand Down Expand Up @@ -440,3 +442,64 @@ export class TypedEventEmitter<Events extends EventsDescription> extends EventEm

/** @public */
export class CancellationToken extends TypedEventEmitter<{ cancel(): void }> {}

/**
* Helper types for dot-notation filter attributes
*/

/** @public */
export type Join<T extends unknown[], D extends string> = T extends []
? ''
: T extends [string | number]
? `${T[0]}`
: T extends [string | number, ...infer R]
? `${T[0]}${D}${Join<R, D>}`
: string;

/** @public */
export type PropertyType<Type, Property extends string> = string extends Property
? unknown
: Property extends keyof Type
? Type[Property]
: Property extends `${number}`
? Type extends ReadonlyArray<infer ArrayType>
? ArrayType
: unknown
: Property extends `${infer Key}.${infer Rest}`
? Key extends `${number}`
? Type extends ReadonlyArray<infer ArrayType>
? PropertyType<ArrayType, Rest>
: unknown
: Key extends keyof Type
? Type[Key] extends Map<string, infer MapType>
? MapType
: PropertyType<Type[Key], Rest>
: unknown
: unknown;

// We dont't support nested circular references
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You could add support for circular types using an accumulator as depth checker and bail out when too deep. This works around the TS error "TS2589: Type instantiation is excessively deep and possibly infinite.". A max depth of 10 is probably enough for most cases without making the TS checker too slow.

Example

type O<T, K extends string, Prefix extends string, Depth extends number[]> = K extends keyof T ? { [_ in `${Prefix}.${K}`]: T[K] } & (T[K] extends object ? SubObjects<T[K], Extract<keyof T[K], string>, `${Prefix}.${K}`, [...Depth, 1]> : {}) : {};

type SubObjects<T, K extends string, Prefix extends string, Depth extends number[]> =
    Depth['length'] extends 10 ? {} : //bail out when too deep
        K extends keyof T ? T[K] extends Array<infer A> ? SubObjects<A, Extract<keyof A, string>, `${Prefix}.${K}.${number}`, [...Depth, 1]> :
            T[K] extends object ? O<T[K], Extract<keyof T[K], string>, Prefix extends '' ? K : `${Prefix}.${K}`, Depth> : { [P in Prefix extends '' ? K :`${Prefix}.${K}`]: T[K] } : {};

type FilterQuery<T> = SubObjects<T, Extract<keyof T, string>, '', []>;

Playground link

Screenshot 2022-01-16 at 06 00 16

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Thanks for the suggestion @marcj! We're going to look into this further (I created NODE-3875 for tracking). For now we have released 4.3.1 which contains a fix for this issue in the case of directly self-referential types.

/** @public */
export type NestedPaths<Type> = Type extends
| string
| number
| boolean
| BSONRegExp
| Binary
| Date
| Decimal128
| Double
| Int32
| Long
| ObjectId
| Timestamp
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? []
: Type extends ReadonlyArray<infer ArrayType>
? [number, ...NestedPaths<ArrayType>]
: Type extends Map<string, any>
? [string]
: // eslint-disable-next-line @typescript-eslint/ban-types
Type extends object
? {
[Key in Extract<keyof Type, string>]: [Key, ...NestedPaths<Type[Key]>];
}[Extract<keyof Type, string>]
: [];
76 changes: 65 additions & 11 deletions test/types/community/collection/filterQuery.test-d.ts
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
import { BSONRegExp, Decimal128, ObjectId } from 'bson';
import { BSONRegExp, Decimal128, Long, ObjectId } from 'bson';
import { expectAssignable, expectError, expectNotType, expectType } from 'tsd';

import { Collection, Filter, MongoClient, WithId } from '../../../../src';
Expand All @@ -16,6 +16,11 @@ const db = client.db('test');
* Test the generic Filter using collection.find<T>() method
*/

interface HumanModel {
_id: ObjectId;
name: string;
}

// a collection model for all possible MongoDB BSON types and TypeScript types
interface PetModel {
_id: ObjectId; // ObjectId field
Expand All @@ -24,14 +29,31 @@ interface PetModel {
age: number; // number field
type: 'dog' | 'cat' | 'fish'; // union field
isCute: boolean; // boolean field
bestFriend?: PetModel; // object field (Embedded/Nested Documents)
bestFriend?: HumanModel; // object field (Embedded/Nested Documents)
createdAt: Date; // date field
numOfPats: Long; // long field
treats: string[]; // array of string
playTimePercent: Decimal128; // bson Decimal128 type
readonly friends?: ReadonlyArray<PetModel>; // readonly array of objects
playmates?: PetModel[]; // writable array of objects
readonly friends?: ReadonlyArray<HumanModel>; // readonly array of objects
playmates?: HumanModel[]; // writable array of objects
laps?: Map<string, number>; // map field
// Object with multiple nested levels
meta?: {
updatedAt?: Date;
deep?: {
nestedArray: number[];
nested?: {
level?: number;
};
};
};
}

const john = {
_id: new ObjectId('577fa2d90c4cc47e31cf4b6a'),
name: 'John'
};

const spot = {
_id: new ObjectId('577fa2d90c4cc47e31cf4b6f'),
name: 'Spot',
Expand All @@ -40,6 +62,7 @@ const spot = {
type: 'dog' as const,
isCute: true,
createdAt: new Date(),
numOfPats: Long.fromBigInt(100000000n),
treats: ['kibble', 'bone'],
playTimePercent: new Decimal128('0.999999')
};
Expand Down Expand Up @@ -83,14 +106,49 @@ expectNotType<Filter<PetModel>>({ age: [23, 43] });

/// it should query __nested document__ fields only by exact match
// TODO: we currently cannot enforce field order but field order is important for mongo
await collectionT.find({ bestFriend: spot }).toArray();
await collectionT.find({ bestFriend: john }).toArray();
/// nested documents query should contain all required fields
expectNotType<Filter<PetModel>>({ bestFriend: { family: 'Andersons' } });
expectNotType<Filter<PetModel>>({ bestFriend: { name: 'Andersons' } });
/// it should not accept wrong types for nested document fields
expectNotType<Filter<PetModel>>({ bestFriend: 21 });
expectNotType<Filter<PetModel>>({ bestFriend: 'Andersons' });
expectNotType<Filter<PetModel>>({ bestFriend: [spot] });
expectNotType<Filter<PetModel>>({ bestFriend: [{ family: 'Andersons' }] });
expectNotType<Filter<PetModel>>({ bestFriend: [{ name: 'Andersons' }] });

/// it should query __nested document__ fields using dot-notation
collectionT.find({ 'meta.updatedAt': new Date() });
collectionT.find({ 'meta.deep.nested.level': 123 });
collectionT.find({ meta: { deep: { nested: { level: 123 } } } }); // no impact on actual nesting
collectionT.find({ 'friends.0.name': 'John' });
collectionT.find({ 'playmates.0.name': 'John' });
// supports arrays with primitive types
collectionT.find({ 'treats.0': 'bone' });
collectionT.find({ 'laps.foo': 123 });

// Handle special BSON types
collectionT.find({ numOfPats: Long.fromBigInt(2n) });
collectionT.find({ playTimePercent: new Decimal128('123.2') });

// works with some extreme indexes
collectionT.find({ 'friends.4294967295.name': 'John' });
collectionT.find({ 'friends.999999999999999999999999999999999999.name': 'John' });

/// it should not accept wrong types for nested document fields
expectNotType<Filter<PetModel>>({ 'meta.updatedAt': 123 });
expectNotType<Filter<PetModel>>({ 'meta.updatedAt': true });
expectNotType<Filter<PetModel>>({ 'meta.updatedAt': 'now' });
expectNotType<Filter<PetModel>>({ 'meta.deep.nested.level': 'string' });
expectNotType<Filter<PetModel>>({ 'meta.deep.nested.level': true });
expectNotType<Filter<PetModel>>({ 'meta.deep.nested.level': new Date() });
expectNotType<Filter<PetModel>>({ 'friends.0.name': 123 });
expectNotType<Filter<PetModel>>({ 'playmates.0.name': 123 });
expectNotType<Filter<PetModel>>({ 'laps.foo': 'string' });
expectNotType<Filter<PetModel>>({ 'treats.0': 123 });
expectNotType<Filter<PetModel>>({ 'numOfPats.__isLong__': true });
expectNotType<Filter<PetModel>>({ 'playTimePercent.bytes.BYTES_PER_ELEMENT': 1 });

// Nested arrays aren't checked
expectNotType<Filter<PetModel>>({ 'meta.deep.nestedArray.0': 'not a number' });

/// it should query __array__ fields by exact match
await collectionT.find({ treats: ['kibble', 'bone'] }).toArray();
Expand Down Expand Up @@ -233,10 +291,6 @@ expectNotType<Filter<PetModel>>({ name: { $all: ['world', 'world'] } });
expectNotType<Filter<PetModel>>({ age: { $elemMatch: [1, 2] } });
expectNotType<Filter<PetModel>>({ type: { $size: 2 } });

// dot key case that shows it is assignable even when the referenced key is the wrong type
expectAssignable<Filter<PetModel>>({ 'bestFriend.name': 23 }); // using dot notation permits any type for the key
expectNotType<Filter<PetModel>>({ bestFriend: { name: 23 } });

// ObjectId are not allowed to be used as a query predicate (issue described here: NODE-3758)
// this only applies to schemas where the _id is not of type ObjectId.
declare const nonObjectIdCollection: Collection<{ _id: number; otherField: string }>;
Expand Down