Dataloader can now resolve to null for nullable fields #4773
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WalkthroughThe changes in this pull request involve modifications to several classes and interfaces related to data loading within the application. Key updates include altering method signatures to allow for more flexible return types, enabling loaders to return Changes
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🧹 Outside diff range and nitpick comments (6)
src/domain/in-app-notification-reader/dto/in.app.notification.callout.published.ts (1)
18-19: LGTM! Properties correctly marked as optional for GraphQL resolution.The change to optional properties (
callout?andspace?) aligns well with the dataloader's new ability to resolve to null, ensuring type-safety throughout the resolution chain.Consider documenting these nullable fields in your GraphQL schema documentation to help API consumers understand when and why these fields might be null. This is especially important for breaking changes where previously non-null fields become nullable.
src/core/dataloader/creators/loader.creators/in-app-notification/space.loader.creator.ts (1)
18-25: Consider documenting the null resolution patternSince this is a significant change in how loaders handle missing entities, consider:
- Adding documentation about when to use
resolveToNullvs letting it throw EntityNotFoundException- Updating GraphQL schema documentation to reflect which fields can resolve to null
- Adding integration tests to verify the behavior with nullable fields
src/domain/in-app-notification-reader/field-resolvers/in.app.notification.community.new.member.resolver.fields.ts (1)
24-24: Address the TODO comment about renamingWhile the nullable field implementation looks good, there's a TODO comment about renaming the
actormethod. Consider addressing this naming concern before merging.Would you like me to help analyze potential alternative names for this method?
Also applies to: 30-31
src/core/dataloader/creators/loader.creators/in-app-notification/community.type.loader.creator.ts (1)
Line range hint
28-48: Consider optimizing the query performanceThe batch loading query joins multiple tables and performs type checking. While the implementation is correct, consider monitoring its performance with large datasets.
Would you like me to suggest potential optimization strategies or help set up performance monitoring?
src/core/dataloader/creators/loader.creators/in-app-notification/contributor.loader.creator.ts (1)
26-30: Consider adding debug options conditionallyThe debugging options (name, loadedTypeName) are always included, which is good for development but might impact production performance.
Consider conditionally including debug options based on environment:
return createBatchLoader(this.contributorsInBatch, { - name: this.constructor.name, - loadedTypeName: 'Contributor', + ...(process.env.NODE_ENV !== 'production' && { + name: this.constructor.name, + loadedTypeName: 'Contributor', + }), resolveToNull: options?.resolveToNull, });src/core/dataloader/utils/createTypedBatchLoader.ts (1)
37-46: Consider enhancing error contextWhile the error handling is good, we could provide more detailed context for debugging.
Consider enhancing the error context:
return resolveToNull ? null : new EntityNotFoundException( - `Could not find ${loadedTypeName} for the given key`, + `Could not find ${loadedTypeName} with ID ${key}`, LogContext.DATA_LOADER, - { id: key } + { id: key, loader: name } );
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📒 Files selected for processing (12)
src/core/dataloader/creators/base/data.loader.creator.ts(1 hunks)src/core/dataloader/creators/base/index.ts(1 hunks)src/core/dataloader/creators/loader.creators/in-app-notification/callout.loader.creator.ts(1 hunks)src/core/dataloader/creators/loader.creators/in-app-notification/community.type.loader.creator.ts(2 hunks)src/core/dataloader/creators/loader.creators/in-app-notification/contributor.loader.creator.ts(1 hunks)src/core/dataloader/creators/loader.creators/in-app-notification/space.loader.creator.ts(1 hunks)src/core/dataloader/utils/createTypedBatchLoader.ts(2 hunks)src/domain/in-app-notification-reader/dto/in.app.notification.callout.published.ts(1 hunks)src/domain/in-app-notification-reader/dto/in.app.notification.community.new.member.ts(1 hunks)src/domain/in-app-notification-reader/dto/in.app.notification.user.mentioned.ts(1 hunks)src/domain/in-app-notification-reader/field-resolvers/in.app.notification.callout.published.resolver.fields.ts(1 hunks)src/domain/in-app-notification-reader/field-resolvers/in.app.notification.community.new.member.resolver.fields.ts(1 hunks)
✅ Files skipped from review due to trivial changes (1)
- src/core/dataloader/creators/base/index.ts
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src/core/dataloader/creators/base/data.loader.creator.ts (1)
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src/domain/in-app-notification-reader/dto/in.app.notification.community.new.member.ts (1)
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src/domain/in-app-notification-reader/dto/in.app.notification.callout.published.ts (1)
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src/domain/in-app-notification-reader/dto/in.app.notification.user.mentioned.ts (1)
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src/core/dataloader/utils/createTypedBatchLoader.ts (1)
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src/core/dataloader/creators/loader.creators/in-app-notification/callout.loader.creator.ts (1)
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src/core/dataloader/creators/loader.creators/in-app-notification/contributor.loader.creator.ts (1)
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src/core/dataloader/creators/loader.creators/in-app-notification/space.loader.creator.ts (1)
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src/core/dataloader/creators/loader.creators/in-app-notification/community.type.loader.creator.ts (1)
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src/domain/in-app-notification-reader/field-resolvers/in.app.notification.callout.published.resolver.fields.ts (1)
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src/domain/in-app-notification-reader/field-resolvers/in.app.notification.community.new.member.resolver.fields.ts (1)
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🔇 Additional comments (15)
src/domain/in-app-notification-reader/dto/in.app.notification.user.mentioned.ts (1)
20-22: Verify the requirement of non-null fields.
The properties contributorType, comment, and commentUrl have been changed from optional to required. While this makes the contract more strict, we should verify that these fields are always available when creating notifications.
Let's check the notification creation flow:
✅ Verification successful
Let me gather more information about the notification payload and resolver to understand how these fields are populated.
Let me try a different approach to find the resolver and payload implementations.
Let me check the resolver implementation and the payload structure.
The non-null fields are correctly implemented and required
The change from optional to required fields is correct and intentional based on the following evidence:
-
The resolver implementation shows that all fields are guaranteed to be populated from the payload:
contributorTypeis resolved frompayload.contributorTypecommentis resolved frompayload.commentcommentUrlis resolved frompayload.commentOrigin.url
-
The resolver fields are explicitly decorated with
nullable: false, indicating these fields should never be null in the GraphQL schema. -
The fields are resolved synchronously with direct property access, meaning the values are expected to be always present in the payload.
🏁 Scripts executed
The following scripts were executed for the analysis:
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#!/bin/bash
# Search for places where InAppNotificationUserMentioned is created
ast-grep --pattern 'new InAppNotificationUserMentioned({
$$$
})'
# Search for the payload creation to verify field availability
rg -A 5 "InAppNotificationContributorMentionedPayload"
Length of output: 1587
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#!/bin/bash
# Search for the resolver implementation
ast-grep --pattern 'class $_ implements $_ {
$$$
resolve$_($_, $_): $_ {
$$$
}
}'
# Search for the payload type definition
rg -A 10 "class InAppNotificationContributorMentionedPayload"
# Search for tests to verify field population
rg -l "InAppNotificationUserMentioned.*test"
Length of output: 204
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#!/bin/bash
# Search for resolver files
fd resolver
# Search for files containing InAppNotificationUserMentioned
rg -l "InAppNotificationUserMentioned"
# Search for the payload type in notifications library imports
rg -A 5 "from '@alkemio/notifications-lib'"
Length of output: 24998
Script:
#!/bin/bash
# Check the resolver implementation
cat src/domain/in-app-notification-reader/field-resolvers/in.app.notification.user.mentioned.resolver.fields.ts
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cat src/domain/in-app-notification-reader/in.app.notification.interface.ts
Length of output: 4099
src/domain/in-app-notification-reader/dto/in.app.notification.community.new.member.ts (1)
21-21: Verify the requirement change for contributorType
The change from optional to required for contributorType seems to contradict the PR's objective of handling nullable fields. Please confirm if this field should always be present when a new community member notification is created.
src/core/dataloader/creators/loader.creators/in-app-notification/callout.loader.creator.ts (2)
4-7: LGTM! Clean import organization
The imports are well organized, separating core functionality from exceptions.
Also applies to: 11-11
17-24: LGTM! Well-implemented loader creation with null resolution support
The implementation correctly supports the new nullable field resolution:
- Proper typing with union type
ICallout | null | EntityNotFoundException - Clean options passing to createBatchLoader
- Consistent naming convention for loader configuration
src/core/dataloader/creators/loader.creators/in-app-notification/space.loader.creator.ts (2)
4-7: LGTM! Consistent import structure
The imports follow the same pattern as other loader creators, maintaining codebase consistency.
Also applies to: 12-12
18-25: LGTM! Well-implemented loader creation with proper typing
The implementation:
- Correctly implements the nullable resolution pattern
- Maintains consistency with other loader creators
- Properly types the return value to include null and EntityNotFoundException
src/domain/in-app-notification-reader/field-resolvers/in.app.notification.callout.published.resolver.fields.ts (2)
15-15: LGTM! Consistent handling of nullable callout field
The changes correctly implement nullable field resolution for the callout field, aligning with the PR objective. The combination of nullable: true in the field definition and resolveToNull: true in the loader ensures proper null handling.
Also applies to: 20-21
27-27: LGTM! Consistent handling of nullable space field
The changes mirror the callout field implementation, maintaining consistency in how nullable fields are handled across the resolver.
Also applies to: 32-33
src/domain/in-app-notification-reader/field-resolvers/in.app.notification.community.new.member.resolver.fields.ts (1)
37-37: LGTM! Consistent nullable field implementation
The space field implementation follows the same pattern as other nullable fields, maintaining consistency across resolvers.
Also applies to: 42-43
src/core/dataloader/creators/loader.creators/in-app-notification/community.type.loader.creator.ts (2)
5-8: LGTM! Clean import organization
The imports are well-organized and properly destructured for better readability.
20-25: LGTM! Proper implementation of nullable resolution support
The create method correctly implements the nullable resolution feature by:
- Accepting optional configuration
- Forwarding the resolveToNull option to the batch loader
- Providing proper type information
src/core/dataloader/creators/loader.creators/in-app-notification/contributor.loader.creator.ts (2)
4-7: LGTM: Type definitions and method signature changes look good!
The updated signature properly implements the nullable field support while maintaining type safety. The inclusion of EntityNotFoundException in the return type provides clear error handling semantics.
Also applies to: 15-15, 23-25
Line range hint 32-48: Review commented SQL query implementation
There's a commented SQL query that seems to handle all contributor types (User, Organization, VirtualContributor) but is currently only implementing User lookup.
Let's verify if this is intentional:
src/core/dataloader/utils/createTypedBatchLoader.ts (2)
8-14: LGTM: Well-structured function signature with proper typing
The updated signature properly handles optional configuration while maintaining type safety. The debugging options are well documented.
Line range hint 49-55: LGTM: Proper DataLoader configuration
The DataLoader configuration is correct with appropriate caching and naming options. The type definition properly includes null in the generic parameter.
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Actionable comments posted: 0
🧹 Outside diff range and nitpick comments (1)
src/core/dataloader/utils/createTypedRelationLoader.ts (1)
15-16: Address the TODO comment about improving typesThe TODO comment indicates that the
TParenttype constraint needs improvement. Consider using a more specific type interface instead of the generic index signature.Would you like me to help create a more specific type interface for the
TParenttype parameter?
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src/core/dataloader/utils/createTypedRelationLoader.ts(1 hunks)src/core/dataloader/utils/createTypedSimpleLoader.ts(2 hunks)
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src/core/dataloader/utils/createTypedRelationLoader.ts (1)
Pattern src/**/*.{ts,js}: Review the TypeScript/JavaScript code for NestJS best practices, dependency injection, module structure, and potential bugs.
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docs/Design.md- Design overview of the projectdocs/Pagination.md- Pagination design overviewdocs/Developing.md- Development setup overviewdocs/graphql-typeorm-usage.md- overview of GraphQL and TypeORM usage and how they are used together with NestJS in the projectdocs/database-definitions.md- guidelines for creating TypeORM entity defnitionssrc/core/error-handling/graphql.exception.filter.ts- GraphQL error handlingsrc/core/error-handling/http.exception.filter.ts- HTTP error handlingsrc/core/error-handling/rest.error.response.ts- REST error responsesrc/core/error-handling/unhandled.exception.filter.ts- Global exception handler
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src/core/dataloader/utils/createTypedSimpleLoader.ts (1)
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🔇 Additional comments (5)
src/core/dataloader/utils/createTypedSimpleLoader.ts (2)
4-4: LGTM: Clean import addition
The import of EntityNotFoundException is properly added and follows the project's import conventions.
15-15: LGTM: Return type enhancement properly handles nullable fields
The return type modification to ILoader<TResult | null | EntityNotFoundException> correctly implements the PR objective by:
- Explicitly declaring all possible return types
- Maintaining type safety
- Following TypeScript best practices
src/core/dataloader/utils/createTypedRelationLoader.ts (3)
8-8: LGTM: Clean import addition
The import of EntityNotFoundException is properly added and follows the project's import conventions.
23-23: LGTM: Return type enhancement properly handles nullable fields
The return type modification to ILoader<TResult | null | EntityNotFoundException> correctly implements the PR objective and maintains consistency with createTypedSimpleLoader.ts.
Line range hint 15-45: Verify the impact of nullable relations
Since the function now handles nullable relations, we should verify that the relation loading logic in findByBatchIds properly handles null cases.
✅ Verification successful
Let me analyze the implementation of findByBatchIds to verify how it handles nullable relations.
Nullable relations are properly handled in the implementation
The findByBatchIds implementation correctly handles nullable relations through the resolveToNull option:
- When
resolveToNullis true, it returns an empty object ({} as TResult) for missing relations - When
resolveToNullis false, it throws anEntityNotFoundException - The option is being actively used across multiple resolvers in the codebase for handling nullable relations (e.g., in whiteboard, callout, and notification resolvers)
- The DataLoader implementation ensures consistent length and order of results, properly mapping nulls/errors to their corresponding keys
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Search for findByBatchIds implementation and its tests
echo "Searching for findByBatchIds implementation:"
ast-grep --pattern 'export const findByBatchIds = $_'
echo "\nSearching for related test files:"
fd -e spec.ts -e test.ts findByBatchIds
Length of output: 4418
Script:
#!/bin/bash
# Search for tests that might cover nullable relations
rg -A 5 "resolveToNull" --type ts
# Search for any test files that might test the dataloader
fd -e spec.ts -e test.ts dataloader
Length of output: 10861
Added option for the dataloader to be able to resolve fields to null if they are nullable
Summary by CodeRabbit
New Features
Bug Fixes
Documentation