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Mapagam

52 SECTIONS · 747 TOPICS

GRAPHQL Roadmap

  1. Understanding GraphQL Core Concepts

    1. 1. Understanding GraphQL vs REST
    2. 2. Understanding Query Language Concepts
    3. 3. Understanding Type System
    4. 4. Understanding Schema-first Design
    5. 5. Understanding Resolver Pattern
    6. Example: Resolver signature
    7. 6. Understanding GraphQL Execution
    8. Execution Pipeline
    9. 7. Understanding Single Endpoint Architecture
    10. 8. Understanding Request-Response Flow
    11. 9. Understanding GraphQL Advantages
    12. 10. Understanding GraphQL Trade-offs

  2. Working with GraphQL Schema

    1. 1. Creating Schema Definition
    2. Example: Minimal SDL
    3. 2. Defining Root Query Type
    4. Example: Query root
    5. 3. Defining Root Mutation Type
    6. Example: Mutation with payload
    7. 4. Defining Root Subscription Type
    8. Example: Subscription
    9. 5. Using Schema Description Strings
    10. Example: Descriptions
    11. 6. Organizing Schema Files
    12. Example: Loading multiple SDL files
    13. 7. Extending Schema Definitions
    14. Example: Module extends Query
    15. 8. Naming Conventions for Types
    16. 9. Naming Conventions for Fields
    17. 10. Using Comments in Schema
    18. 11. Validating Schema Design

  3. Working with Scalar Types

    1. 1. Using Built-in Scalars
    2. 2. Defining Custom Scalar Types
    3. Example: Custom DateTime scalar
    4. 3. Implementing Scalar Serialization
    5. 4. Implementing Scalar Parsing
    6. 5. Validating Scalar Values
    7. Example: Throw on invalid input
    8. 6. Creating Date Scalar
    9. 7. Creating JSON Scalar
    10. 8. Creating Email Scalar
    11. Example: EmailAddress via graphql-scalars
    12. 9. Creating URL Scalar
    13. 10. Creating Upload Scalar

  4. Working with Object Types

    1. 1. Creating Object Types
    2. Example: Object type
    3. 2. Defining Fields with Types
    4. 3. Making Fields Required
    5. 4. Making Fields Nullable
    6. 5. Defining Field Arguments
    7. Example: Arguments with defaults
    8. 6. Setting Default Argument Values
    9. 7. Using Type References
    10. 8. Implementing Interfaces
    11. Example: Implements Node
    12. 9. Creating Abstract Types
    13. 10. Organizing Related Types

  5. Working with Input Types

    1. 1. Defining Input Object Types
    2. Example: Input definition
    3. 2. Using Input Types in Arguments
    4. Example: Single input arg pattern
    5. 3. Nesting Input Objects
    6. Example: Nested address input
    7. 4. Setting Input Field Defaults
    8. 5. Validating Input Data
    9. 6. Creating Reusable Inputs
    10. 7. Input vs Output Types
    11. 8. Naming Input Types
    12. 9. Using OneOf Input Objects
    13. Example: OneOf input
    14. 10. Handling Optional Input Fields

  6. Working with Interfaces

    1. 1. Creating Interface Types
    2. Example: Interface
    3. 2. Implementing Interfaces
    4. Example: Multiple interfaces
    5. 3. Defining Common Fields
    6. 4. Querying Interface Fields
    7. Example: Interface field selection
    8. 5. Resolving Abstract Types
    9. Example: __resolveType
    10. 6. Interface Implementing Interface
    11. Example: Hierarchical interfaces
    12. 7. Using Type Conditions
    13. 8. Creating Polymorphic Schemas
    14. 9. Designing Interface Hierarchies
    15. 10. Choosing Interface vs Type

  7. Working with Union Types

    1. 1. Creating Union Types
    2. Example: Search union
    3. 2. Defining Union Members
    4. 3. Querying Union Types
    5. Example: Selecting from union
    6. 4. Using Type Conditions
    7. 5. Resolving Union Types
    8. Example: __resolveType for union
    9. 6. Creating Search Result Unions
    10. 7. Creating Error Unions
    11. Example: Result-or-error union
    12. 8. Combining Unions with Interfaces
    13. 9. Narrowing Union Types
    14. 10. Choosing Union vs Interface

  8. Working with Enums

    1. 1. Defining Enum Types
    2. Example: Enum declaration
    3. 2. Using Enum Values
    4. 3. Providing Enum Descriptions
    5. Example: Per-value descriptions
    6. 4. Mapping Enum Values
    7. Example: Internal value mapping
    8. 5. Deprecating Enum Values
    9. Example: @deprecated value
    10. 6. Using Enums in Arguments
    11. Example: Filter by enum
    12. 7. Using Enums in Filters
    13. 8. Creating Status Enums
    14. Example: Order status
    15. 9. Creating Role Enums
    16. Example: Role-based access
    17. 10. Validating Enum Values

  9. Working with Lists and Non-Null

    1. 1. Defining List Types
    2. 2. Making Lists Required
    3. 3. Making List Items Required
    4. 4. Combining Modifiers
    5. 5. Understanding Nullability Rules
    6. 6. Returning Empty Lists
    7. 7. Handling Null Items
    8. 8. Paginating Lists
    9. 9. Limiting List Size
    10. 10. Sorting List Results
    11. Example: Multi-field sort

  10. Understanding Nullability Semantics

    1. 1. Understanding Null Propagation
    2. Example: Null bubbles up
    3. 2. Making Fields Non-nullable
    4. 3. Making Arguments Non-nullable
    5. 4. Handling Null Values
    6. 5. Using Null as Default
    7. 6. Validating Null Inputs
    8. Example: Distinguish omitted vs explicit null
    9. 7. Returning Null vs Empty
    10. 8. Null in Lists
    11. 9. Designing Null-safe Schemas
    12. 10. Using Maybe Types

  11. Using GraphQL Directives

    1. 1. Understanding Built-in Directives
    2. 2. Using @skip Directive
    3. Example: Conditional skip
    4. 3. Using @include Directive
    5. Example: Conditional include
    6. 4. Using @deprecated Directive
    7. Example: Field deprecation
    8. 5. Creating Custom Directives
    9. Example: Custom directive declaration
    10. 6. Defining Directive Locations
    11. 7. Implementing Directive Logic
    12. Example: @upper via schema mapper
    13. 8. Using Schema Directives
    14. 9. Creating Auth Directives
    15. Example: @auth implementation
    16. 10. Creating Validation Directives
    17. 11. Creating Formatting Directives
    18. 12. Repeating Directives
    19. Example: Repeatable directive

  12. Using Modern Directives (defer, stream)

    1. 1. Understanding @defer Directive
    2. 2. Using @defer for Slow Fields
    3. Example: Defer slow nested data
    4. 3. Understanding @stream Directive
    5. 4. Using @stream for Large Lists
    6. Example: Stream comments
    7. 5. Implementing Incremental Delivery
    8. 6. Handling Deferred Responses
    9. Example: Initial then incremental payloads
    10. 7. Handling Streamed Responses
    11. 8. Combining @defer and @stream
    12. Example: Defer fragment containing streamed list
    13. 9. Understanding Browser Support
    14. 10. Using with Apollo Client
    15. Example: Apollo Client setup

  13. Writing GraphQL Queries

    1. 1. Creating Basic Queries
    2. 2. Using Query Arguments
    3. Example: Field arguments
    4. 3. Nesting Query Fields
    5. 4. Using Aliases
    6. Example: Aliases for duplicate fields
    7. 5. Requesting Multiple Root Fields
    8. Example: Single round-trip
    9. 6. Using Field Arguments
    10. 7. Selecting Scalar Fields
    11. 8. Selecting Object Fields
    12. Example: Nested objects
    13. 9. Querying Lists
    14. Example: List handling
    15. 10. Using Query Variables
    16. Example: Variables
    17. 11. Setting Query Operation Name

  14. Working with Fragments

    1. 1. Defining Named Fragments
    2. Example: Named fragment
    3. 2. Using Fragment Spreads
    4. 3. Creating Inline Fragments
    5. Example: Inline fragment
    6. 4. Reusing Fragments
    7. 5. Using Type Conditions
    8. 6. Nesting Fragments
    9. Example: Composed fragments
    10. 7. Using Fragment Variables
    11. 8. Organizing Fragment Libraries
    12. 9. Using Interface Fragments
    13. Example: Interface fragment
    14. 10. Using Union Fragments
    15. Example: Union with fragments

  15. Using Query Variables

    1. 1. Declaring Variables
    2. 2. Using Variables in Arguments
    3. Example: Variable usage
    4. 3. Making Variables Required
    5. 4. Setting Default Values
    6. Example: Default variable
    7. 5. Using Input Objects as Variables
    8. Example: Input object variable
    9. 6. Passing Variables from Client
    10. 7. Validating Variable Types
    11. 8. Using Variables in Directives
    12. Example: Variable-controlled directive
    13. 9. Handling Null Variables
    14. 10. Organizing Complex Variables

  16. Writing GraphQL Mutations

    1. 1. Defining Mutation Fields
    2. 2. Using Mutation Arguments
    3. Example: Single input arg
    4. 3. Returning Mutation Payload
    5. 4. Creating Records
    6. Example: Create mutation
    7. 5. Updating Records
    8. 6. Deleting Records
    9. Example: Delete returns id
    10. 7. Using Input Objects
    11. 8. Returning Updated Data
    12. Example: Return entity to update cache
    13. 9. Handling Mutation Errors
    14. 10. Using Mutation Variables
    15. Example: Mutation with variables
    16. 11. Batching Mutations
    17. 12. Implementing Optimistic Updates
    18. Example: Apollo optimistic response

  17. Working with Subscriptions

    1. 1. Defining Subscription Fields
    2. 2. Setting Up Subscription Server
    3. Example: graphql-ws + Apollo Server
    4. 3. Subscribing to Events
    5. Example: Resolver with PubSub
    6. 4. Publishing Events
    7. Example: Publish from mutation
    8. 5. Filtering Subscription Events
    9. Example: withFilter
    10. 6. Using Subscription Variables
    11. 7. Handling Subscription Lifecycle
    12. 8. Implementing Real-time Updates
    13. 9. Using Subscription Resolvers
    14. 10. Handling Subscription Errors
    15. 11. Securing Subscriptions

  18. Implementing Resolvers

    1. 1. Understanding Resolver Function
    2. 2. Implementing Field Resolvers
    3. Example: Field resolver map
    4. 3. Using Parent Argument
    5. 4. Using Args Argument
    6. 5. Using Context Argument
    7. Example: Context with auth + DB
    8. 6. Using Info Argument
    9. 7. Returning Resolver Values
    10. 8. Implementing Default Resolvers
    11. 9. Chaining Resolvers
    12. Example: Resolver chain
    13. 10. Using Async Resolvers
    14. 11. Implementing Computed Fields
    15. Example: Computed field
    16. 12. Mapping Data Sources

  19. Working with Resolver Context

    1. 1. Creating Context Object
    2. 2. Adding User Authentication
    3. Example: Verify JWT in context
    4. 3. Adding Database Connections
    5. 4. Adding Data Loaders
    6. Example: Per-request loaders
    7. 5. Adding Request Information
    8. 6. Sharing Context Across Resolvers
    9. 7. Implementing Context Functions
    10. Example: Apollo Server context fn
    11. 8. Using Context for Authorization
    12. Example: Role check
    13. 9. Adding Logger to Context
    14. 10. Managing Context Lifecycle

  20. Implementing DataLoader Pattern

    1. 1. Understanding N+1 Problem
    2. 2. Creating DataLoader Instance
    3. Example: Basic loader
    4. 3. Implementing Batch Function
    5. 4. Using DataLoader in Resolver
    6. Example: Loader in resolver
    7. 5. Batching Database Queries
    8. Example: SQL IN batch
    9. 6. Caching Loaded Data
    10. 7. Clearing DataLoader Cache
    11. 8. Priming DataLoader Cache
    12. Example: Prime after fetch
    13. 9. Handling Load Errors
    14. 10. Creating Multiple Loaders
    15. 11. Using Loader with Foreign Keys
    16. Example: One-to-many loader

  21. Implementing Pagination

    1. 1. Understanding Pagination Patterns
    2. 2. Implementing Offset Pagination
    3. Example: Offset args
    4. 3. Implementing Cursor Pagination
    5. 4. Using Relay Connection Spec
    6. Example: Relay Connection schema
    7. 5. Creating PageInfo Type
    8. 6. Implementing Forward Pagination
    9. Example: Forward pagination resolver
    10. 7. Implementing Backward Pagination
    11. 8. Creating Edge Type
    12. 9. Generating Cursors
    13. 10. Handling Empty Results
    14. 11. Setting Page Size Limits
    15. Example: Cap page size
    16. 12. Implementing Total Count

  22. Implementing Filtering and Sorting

    1. 1. Defining Filter Input Types
    2. Example: Composable filter
    3. 2. Using Comparison Operators
    4. 3. Using Logical Operators
    5. Example: AND/OR/NOT
    6. 4. Implementing String Filters
    7. 5. Implementing Date Filters
    8. Example: Date filter
    9. 6. Implementing Null Filters
    10. 7. Defining Sort Input Types
    11. Example: Sort input
    12. 8. Using Sort Direction
    13. 9. Implementing Multi-field Sorting
    14. Example: Multi-field sort
    15. 10. Combining Filters and Sorting

  23. Implementing Search Functionality

    1. 1. Defining Search Fields
    2. Example: Search query field
    3. 2. Using Search Arguments
    4. 3. Implementing Full-text Search
    5. 4. Implementing Fuzzy Search
    6. 5. Using Search Operators
    7. 6. Implementing Search Filters
    8. Example: Faceted search
    9. 7. Implementing Search Sorting
    10. 8. Highlighting Search Results
    11. Example: Highlight field
    12. 9. Implementing Search Pagination
    13. 10. Optimizing Search Performance

  24. Implementing Batch Operations

    1. 1. Creating Batch Mutations
    2. Example: Batch create
    3. 2. Using Input Lists
    4. 3. Returning Batch Results
    5. 4. Handling Partial Failures
    6. 5. Validating Batch Size
    7. Example: Cap batch input
    8. 6. Implementing Transactional Batches
    9. Example: DB transaction
    10. 7. Optimizing Batch Performance
    11. 8. Using Batch Loaders
    12. 9. Implementing Batch Queries
    13. Example: Batch get
    14. 10. Returning Batch Metadata

  25. Handling GraphQL Errors

    1. 1. Throwing Errors in Resolvers
    2. Example: Throw GraphQLError
    3. 2. Using GraphQLError Class
    4. 3. Adding Error Extensions
    5. Example: Rich extensions
    6. 4. Formatting Error Responses
    7. Example: formatError hook
    8. 5. Handling Validation Errors
    9. 6. Handling Authentication Errors
    10. Example: 401-style error
    11. 7. Handling Authorization Errors
    12. Example: 403-style error
    13. 8. Handling Not Found Errors
    14. 9. Masking Internal Errors
    15. 10. Logging Errors
    16. 11. Returning Partial Data
    17. 12. Using Error Codes

  26. Using Error Union Pattern

    1. 1. Understanding Error Unions
    2. 2. Creating Success and Error Types
    3. Example: Result union
    4. 3. Returning Typed Errors
    5. Example: Resolver returning union
    6. 4. Querying Error Unions
    7. Example: Client query
    8. 5. Handling User Errors
    9. 6. Handling System Errors
    10. 7. Designing Error Hierarchies
    11. Example: Common error interface
    12. 8. Providing Error Details
    13. 9. Implementing Recoverable Errors
    14. 10. Combining with Exceptions

  27. Validating Queries and Schema

    1. 1. Understanding Validation Rules
    2. 2. Validating Query Syntax
    3. 3. Validating Field Selection
    4. 4. Validating Arguments
    5. 5. Validating Fragments
    6. 6. Validating Variables
    7. 7. Validating Directives
    8. 8. Creating Custom Validation Rules
    9. Example: Depth limit
    10. 9. Disabling Validation Rules
    11. 10. Handling Validation Errors
    12. Example: Validation error response

  28. Implementing Authentication

    1. 1. Validating JWT Tokens
    2. Example: JWT verification middleware
    3. 2. Adding User to Context
    4. 3. Protecting Resolvers
    5. Example: Auth helper
    6. 4. Creating Auth Directives
    7. 5. Handling Unauthenticated Requests
    8. 6. Implementing Login Mutation
    9. Example: Login
    10. 7. Implementing Logout Mutation
    11. 8. Refreshing Access Tokens
    12. Example: Refresh mutation
    13. 9. Using Session-based Auth
    14. 10. Implementing Social Auth

  29. Implementing Authorization

    1. 1. Implementing Role-based Access
    2. Example: RBAC check
    3. 2. Implementing Permission-based Access
    4. 3. Creating Auth Directives
    5. Example: Permission directive
    6. 4. Checking Field-level Permissions
    7. Example: Field-level check
    8. 5. Checking Object-level Permissions
    9. 6. Using Context for Permissions
    10. Example: Permission helper on context
    11. 7. Implementing Resource Authorization
    12. 8. Handling Unauthorized Access
    13. 9. Hiding Unauthorized Fields
    14. Example: Conditional null
    15. 10. Implementing Row-level Security

  30. Implementing Field-level Security

    1. 1. Protecting Sensitive Fields
    2. 2. Using Shield Directives
    3. Example: graphql-shield rule tree
    4. 3. Implementing Field Middleware
    5. 4. Masking Field Values
    6. Example: Mask credit card
    7. 5. Conditional Field Resolution
    8. 6. Auditing Field Access
    9. Example: Audit log on sensitive read
    10. 7. Rate Limiting Fields
    11. 8. Implementing Cost Analysis
    12. Example: graphql-cost-analysis
    13. 9. Hiding Fields by Role
    14. 10. Validating Field Arguments
    15. Example: Argument validation

  31. Handling File Uploads

    1. 1. Understanding Upload Scalar
    2. 2. Configuring Upload Middleware
    3. Example: graphql-upload setup
    4. 3. Defining Upload Mutation
    5. Example: Upload mutation SDL
    6. 4. Processing Uploaded Files
    7. Example: Stream to disk
    8. 5. Validating File Types
    9. 6. Validating File Size
    10. Example: Size cap
    11. 7. Storing Files
    12. 8. Generating File URLs
    13. 9. Handling Multiple Uploads
    14. Example: Parallel processing
    15. 10. Implementing Progress Tracking

  32. Implementing Soft Deletes

    1. 1. Adding Deleted Flag
    2. 2. Adding Deleted Timestamp
    3. Example: Soft-delete schema
    4. 3. Filtering Deleted Records
    5. Example: Default filter
    6. 4. Implementing Restore Mutation
    7. 5. Implementing Permanent Delete
    8. Example: Hard purge
    9. 6. Showing Deleted Records
    10. 7. Using Deleted By Field
    11. 8. Cascading Soft Deletes
    12. Example: Cascade transactionally
    13. 9. Archiving Deleted Data
    14. 10. Implementing Trash/Recycle Bin
    15. Example: Trash query

  33. Implementing Audit Logging

    1. 1. Adding Created Timestamp
    2. 2. Adding Updated Timestamp
    3. 3. Adding Created By Field
    4. Example: Created/updated by
    5. 4. Adding Updated By Field
    6. 5. Logging Field Changes
    7. Example: Diff before/after
    8. 6. Implementing Audit Trail
    9. 7. Storing Change Metadata
    10. 8. Querying Audit Logs
    11. Example: Audit log query
    12. 9. Implementing Version History
    13. 10. Using Event Sourcing

  34. Implementing Internationalization

    1. 1. Implementing Locale Arguments
    2. Example: locale arg
    3. 2. Translating Field Values
    4. 3. Using Translation Objects
    5. Example: All translations
    6. 4. Storing Translations
    7. 5. Implementing Fallback Locale
    8. Example: Locale fallback chain
    9. 6. Formatting Dates
    10. 7. Formatting Numbers
    11. 8. Formatting Currency
    12. Example: Money type
    13. 9. Implementing RTL Support
    14. 10. Using Accept-Language Header
    15. Example: Locale from header

  35. Implementing Real-time Features

    1. 1. Setting Up WebSocket Server
    2. Example: graphql-ws
    3. 2. Managing Connection Lifecycle
    4. 3. Implementing Live Queries
    5. 4. Using Server-sent Events
    6. Example: graphql-sse
    7. 5. Implementing Presence Features
    8. 6. Broadcasting Events
    9. Example: Redis-backed PubSub
    10. 7. Filtering Real-time Updates
    11. 8. Implementing Event Sourcing
    12. 9. Handling Connection Drops
    13. 10. Scaling Real-time Services

  36. Optimizing Query Performance

    1. 1. Understanding Query Complexity
    2. 2. Implementing Depth Limiting
    3. Example: graphql-depth-limit
    4. 3. Implementing Complexity Analysis
    5. Example: Cost analysis
    6. 4. Setting Query Timeouts
    7. 5. Using Persisted Queries
    8. 6. Implementing Query Batching
    9. 7. Using APQ
    10. Example: Automatic Persisted Queries (Apollo)
    11. 8. Implementing Field-level Caching
    12. Example: Cache hint
    13. 9. Optimizing Database Queries
    14. 10. Using Database Indexes
    15. 11. Implementing Read Replicas

  37. Implementing Caching Strategies

    1. 1. Understanding Cache Levels
    2. 2. Using Response Caching
    3. Example: Yoga response cache
    4. 3. Implementing Cache Control
    5. 4. Setting Cache Hints
    6. Example: Apollo cacheControl
    7. 5. Using ETags
    8. 6. Implementing Field-level Cache
    9. 7. Using Redis Cache
    10. Example: Redis-backed loader
    11. 8. Implementing Cache Invalidation
    12. 9. Using Cache Keys
    13. 10. Configuring Cache TTL

  38. Implementing Rate Limiting

    1. 1. Understanding Rate Limit Strategies
    2. 2. Implementing IP-based Limits
    3. 3. Implementing User-based Limits
    4. Example: User rate limit
    5. 4. Implementing Query Complexity Limits
    6. 5. Using Rate Limit Headers
    7. 6. Implementing Throttling
    8. 7. Whitelisting Queries
    9. 8. Handling Rate Limit Errors
    10. Example: Throw rate-limit error
    11. 9. Using Redis for Rate Limiting
    12. 10. Implementing Burst Limits

  39. Working with GraphQL over HTTP

    1. 1. Understanding HTTP Methods
    2. 2. Sending Query in Request Body
    3. Example: POST request
    4. 3. Sending Query in URL
    5. Example: GET request
    6. 4. Setting Content-Type Header
    7. 5. Handling HTTP Status Codes
    8. 6. Using Accept Header
    9. 7. Implementing CORS
    10. Example: Express CORS
    11. 8. Using GraphQL Endpoint
    12. 9. Batching HTTP Requests
    13. 10. Implementing Compression

  40. Using Schema Introspection

    1. 1. Understanding Introspection System
    2. 2. Querying Schema Types
    3. Example: List all types
    4. 3. Querying Type Fields
    5. Example: Inspect a type
    6. 4. Querying Input Fields
    7. Example: Inspect input type
    8. 5. Querying Enum Values
    9. Example: Inspect enum
    10. 6. Querying Interfaces
    11. Example: Interfaces and implementers
    12. 7. Querying Possible Types
    13. 8. Disabling Introspection
    14. Example: Disable in production
    15. 9. Using __typename Field
    16. 10. Building Schema Documentation
    17. 11. Implementing Schema Diffing
    18. Example: graphql-inspector diff

  41. Working with Schema Stitching

    1. 1. Understanding Schema Composition
    2. 2. Merging Type Definitions
    3. Example: stitchSchemas
    4. 3. Delegating to Subschemas
    5. Example: delegateToSchema
    6. 4. Transforming Schemas
    7. 5. Handling Type Conflicts
    8. 6. Implementing Type Extensions
    9. Example: Extend across services
    10. 7. Forwarding Context
    11. 8. Batching Delegated Queries
    12. 9. Handling Errors in Stitching
    13. 10. Testing Stitched Schema

  42. Implementing GraphQL Federation

    1. 1. Understanding Federated Architecture
    2. 2. Defining Entity Types
    3. Example: Entity with @key
    4. 3. Extending External Types
    5. Example: Extend User in orders subgraph
    6. 4. Referencing External Fields
    7. 5. Requiring External Fields
    8. Example: @requires
    9. 6. Providing External Fields
    10. Example: @provides
    11. 7. Resolving Entity References
    12. Example: __resolveReference
    13. 8. Understanding Federated Queries
    14. 9. Implementing Federation Directives
    15. 10. Handling Cross-service Joins

  43. Using GraphQL Gateway

    1. 1. Understanding Gateway Pattern
    2. 2. Setting Up Apollo Gateway
    3. Example: Apollo Router (recommended)
    4. 3. Configuring Supergraph Schema
    5. 4. Implementing Query Planning
    6. 5. Handling Service Health
    7. 6. Routing Requests
    8. 7. Implementing Custom Resolvers
    9. 8. Managing Service Updates
    10. 9. Handling Partial Failures
    11. 10. Monitoring Gateway Performance

  44. Implementing Schema Versioning

    1. 1. Understanding API Versioning
    2. 2. Using Field Deprecation
    3. Example: Deprecating with reason
    4. 3. Implementing Graceful Deprecation
    5. Deprecation Lifecycle
    6. 4. Adding New Fields
    7. 5. Using Optional Arguments
    8. 6. Implementing Breaking Changes
    9. 7. Versioning with Namespaces
    10. Example: Namespace under root
    11. 8. Using Schema Directives
    12. 9. Communicating Changes
    13. 10. Migrating Clients

  45. Testing GraphQL APIs

    1. 1. Setting Up Test Environment
    2. 2. Testing Queries
    3. Example: In-process query test
    4. 3. Testing Mutations
    5. Example: Mutation test
    6. 4. Testing Subscriptions
    7. Example: Subscribe test
    8. 5. Testing Resolvers
    9. 6. Mocking Data Sources
    10. Example: Schema mocking
    11. 7. Testing Error Handling
    12. 8. Testing Authentication
    13. Example: Auth scenarios
    14. 9. Testing Authorization
    15. 10. Using Schema Testing
    16. 11. Testing Performance
    17. 12. Snapshot Testing
    18. Example: Snapshot

  46. Monitoring GraphQL APIs

    1. 1. Implementing Query Logging
    2. Example: Envelop logger plugin
    3. 2. Tracking Query Performance
    4. 3. Implementing Tracing
    5. 4. Using OpenTelemetry
    6. Example: OTel instrumentation
    7. 5. Tracking Error Rates
    8. 6. Implementing Health Checks
    9. Example: Liveness + readiness
    10. 7. Creating Performance Dashboards
    11. 8. Alerting on Errors
    12. 9. Tracking Schema Usage
    13. 10. Implementing Request ID
    14. Example: Trace correlation

  47. Debugging GraphQL APIs

    1. 1. Using GraphQL Playground
    2. 2. Using GraphiQL
    3. 3. Inspecting Query Execution
    4. Example: Print execution path
    5. 4. Using Debug Logging
    6. 5. Analyzing Query Performance
    7. 6. Tracing Resolver Execution
    8. Example: Per-resolver span
    9. 7. Debugging N+1 Queries
    10. 8. Profiling Memory Usage
    11. 9. Testing with Mock Data
    12. 10. Using Browser DevTools

  48. Working with GraphQL Tools

    1. 1. Using GraphQL Code Generator
    2. Example: codegen.ts
    3. 2. Generating TypeScript Types
    4. 3. Using Apollo CLI
    5. 4. Using GraphQL Inspector
    6. 5. Using GraphQL ESLint
    7. Example: ESLint config
    8. 6. Generating SDK from Schema
    9. 7. Using Relay Compiler
    10. 8. Using GraphQL Config
    11. Example: graphql.config.ts
    12. 9. Using GraphQL Voyager
    13. 10. Using GraphQL Editor

  49. Integrating with Databases

    1. 1. Connecting to SQL Databases
    2. 2. Connecting to NoSQL Databases
    3. 3. Using ORM Integration
    4. 4. Mapping Types to Tables
    5. Example: Prisma → GraphQL
    6. 5. Generating Schema from Database
    7. 6. Implementing Query Builders
    8. 7. Using Connection Pooling
    9. 8. Handling Transactions
    10. Example: Prisma transaction
    11. 9. Implementing Database Migrations
    12. 10. Optimizing Database Access

  50. Implementing GraphQL Security

    1. 1. Protecting Against Query Abuse
    2. 2. Implementing Query Whitelisting
    3. Example: Persisted-only mode
    4. 3. Preventing Schema Leakage
    5. 4. Validating Input Data
    6. 5. Implementing CSRF Protection
    7. Example: Apollo CSRF prevention
    8. 6. Securing WebSocket Connections
    9. 7. Implementing API Key Authentication
    10. Example: API key middleware
    11. 8. Using TLS/HTTPS
    12. 9. Auditing Security Vulnerabilities
    13. 10. Following OWASP Guidelines

  51. Implementing Design Patterns

    1. 1. Using Relay Connection Pattern
    2. Example: Connection types
    3. 2. Using Node Interface Pattern
    4. Example: Global ID
    5. 3. Implementing Viewer Pattern
    6. Example: Viewer root
    7. 4. Using Payload Types Pattern
    8. Example: Mutation payload
    9. 5. Implementing Result Types Pattern
    10. Example: Union result
    11. 6. Using Composition Pattern
    12. 7. Implementing Repository Pattern
    13. Example: Repository
    14. 8. Using Service Layer Pattern
    15. 9. Implementing Facade Pattern
    16. 10. Using Factory Pattern
    17. Example: Loader factory

  52. Following GraphQL Best Practices

    1. 1. Designing Schema for Flexibility
    2. 2. Using Consistent Naming Conventions
    3. 3. Documenting Schema Fields
    4. Example: Descriptions
    5. 4. Implementing Proper Error Handling
    6. 5. Using Input Validation
    7. 6. Implementing Security Best Practices
    8. 7. Optimizing Performance
    9. 8. Following GraphQL Specification
    10. 9. Using Nullable Fields Wisely
    11. 10. Keeping Schema Simple