実践GraphQL on Scala/Real world GraphQL on Scala

Transcript

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8. ɹ(SBQI2-ʁ 8

9. 9 (SBQI2-
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   https://en.wikipedia.org/wiki/GraphQL

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14. (SBQI2-ͱ͸ 14 https://gql.foundation/

15. (SBQI2-ΩςΔ 15

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19. 3&45GVM
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21. ஫ҙ఺ w (SBQI2-͸ศར͕ͩɺۜͷ஄ؙͰ͸ͳ͍
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25. OVMMBCMFOPOOVMM
    -JTU type User { name: String! projects: [Project!]! }

    25 case class User(name: String, projects: Seq[Project]) type User { name: String projects: [Project] } case class User( name: Option[String], projects: Option[Seq[Option[Project]]])

26. ࣮ફʁ 26

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28. ͳͥ(SBQI2-Λ࠾༻ͨ͠ͷ͔ w ؅ཧը໘࡞Δ͚ͲɺͲ͏΍ͬͯ࡞Δʁ
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29. 3&45GVM
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    w )551ͱ૬ੑ͕ྑ͘ͳ͍
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    ը૾

30. 3&45GVM
    (SBQI2-ͱͷൺֱ 30 QSPT DPOT 3&45GVM w Α͘஌ΒΕ͍ͯΔ
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31. 3&45GVM
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32. ͳͥ(SBQI2-Λ࠾༻ͨ͠ͷ͔ w ͋ͱ͸λΠϛϯά
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33. (SBQI2-Λ࠾༻ͯ͠Ͳ͏ʁ w "1*ઃܭͰ೰Ή͜ͱ͕গͳͯ͘޾ͤ
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34. 4DBMBͰͷ(SBQI2- 34

35. 4DBMBͰͷ(SBQI2- w TBOHSJBHSBQIRMTBOHSJB
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36. implicit val userType: ObjectType[Ctx, User] = ObjectType(name = "User", fields

    = fields[Ctx, User]( Field("id", IDType, resolve = { ctx => ctx.value.id }), Field("name", StringType, resolve = { ctx: Context[Ctx, User] => ctx.value.name }), Field("status", userStatusType, resolve = { ctx => ctx.value.status }), Field("projects", ListType(projectType), resolve = { ctx => ProjectResolver.byUser(ctx.value) }) ) ) 0CKFDU5ZQF type User { id: ID! name: String! status: UserStatus! projects: [Project!]! } 36 (SBQI2-ͷܕఆٛ 4BOHSJBͰͷఆٛ

37. type User { id: ID! name: String! status: UserStatus! projects:

    [Project!]! } implicit val userType: ObjectType[Ctx, User] = ObjectType(name = "User", fields = fields[Ctx, User]( Field("id", IDType, resolve = { ctx => ctx.value.id }), Field("name", StringType, resolve = { ctx: Context[Ctx, User] => ctx.value.name }), Field("status", userStatusType, resolve = { ctx => ctx.value.status }), Field("projects", ListType(projectType), resolve = { ctx => ProjectResolver.byUser(ctx.value) }) ) ) 0CKFDU5ZQF 37

38. type User { id: ID! name: String! status: UserStatus! projects:

    [Project!]! } implicit val userType: ObjectType[Ctx, User] = ObjectType(name = "User", fields = fields[Ctx, User]( Field("id", IDType, resolve = { ctx => ctx.value.id }), Field("name", StringType, resolve = { ctx: Context[Ctx, User] => ctx.value.name }), Field("status", userStatusType, resolve = { ctx => ctx.value.status }), Field("projects", ListType(projectType), resolve = { ctx => ProjectResolver.byUser(ctx.value) }) ) ) 0CKFDU5ZQF 38 0CKFDU5ZQFʹ
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39. type User { id: ID! name: String! status: UserStatus! projects:

    [Project!]! } implicit val userType: ObjectType[Ctx, User] = ObjectType(name = "User", fields = fields[Ctx, User]( Field("id", IDType, resolve = { ctx => ctx.value.id }), Field("name", StringType, resolve = { ctx: Context[Ctx, User] => ctx.value.name }), Field("status", userStatusType, resolve = { ctx => ctx.value.status }), Field("projects", ListType(projectType), resolve = { ctx => ProjectResolver.byUser(ctx.value) }) ) ) 0CKFDU5ZQF 39 $POUFYU ޙड़

40. type User { id: ID! name: String! status: UserStatus! projects:

    [Project!]! } implicit val userType: ObjectType[Ctx, User] = ObjectType(name = "User", fields = fields[Ctx, User]( Field("id", IDType, resolve = { ctx => ctx.value.id }), Field("name", StringType, resolve = { ctx: Context[Ctx, User] => ctx.value.name }), Field("status", userStatusType, resolve = { ctx => ctx.value.status }), Field("projects", ListType(projectType), resolve = { ctx => ProjectResolver.byUser(ctx.value) }) ) ) 0CKFDU5ZQF 40 ϑΟʔϧυఆٛ

41. type User { id: ID! name: String! status: UserStatus! projects:

    [Project!]! } implicit val userType: ObjectType[Ctx, User] = ObjectType(name = "User", fields = fields[Ctx, User]( Field("id", IDType, resolve = { ctx => ctx.value.id }), Field("name", StringType, resolve = { ctx: Context[Ctx, User] => ctx.value.name }), Field("status", userStatusType, resolve = { ctx => ctx.value.status }), Field("projects", ListType(projectType), resolve = { ctx => ProjectResolver.byUser(ctx.value) }) ) ) 0CKFDU5ZQF 41 AOBNFAϑΟʔϧυ

42. type User { id: ID! name: String! status: UserStatus! projects:

    [Project!]! } implicit val userType: ObjectType[Ctx, User] = ObjectType(name = "User", fields = fields[Ctx, User]( Field("id", IDType, resolve = { ctx => ctx.value.id }), Field("name", StringType, resolve = { ctx: Context[Ctx, User] => ctx.value.name }), Field("status", userStatusType, resolve = { ctx => ctx.value.status }), Field("projects", ListType(projectType), resolve = { ctx => ProjectResolver.byUser(ctx.value) }) ) ) 0CKFDU5ZQF 42 SFTPMWFؔ਺ͷ$POUFYUʹ͸
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43. type User { id: ID! name: String! status: UserStatus! projects:

    [Project!]! } implicit val userType: ObjectType[Ctx, User] = ObjectType(name = "User", fields = fields[Ctx, User]( Field("id", IDType, resolve = { ctx => ctx.value.id }), Field("name", StringType, resolve = { ctx: Context[Ctx, User] => ctx.value.name }), Field("status", userStatusType, resolve = { ctx => ctx.value.status }), Field("projects", ListType(projectType), resolve = { ctx => ProjectResolver.byUser(ctx.value) }) ) ) 0CKFDU5ZQF 43 $POUFYUWBMVFͰ6TFSܕͷ
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44. implicit val userType: ObjectType[Ctx, User] = ObjectType(name = "User", fields

    = fields[Ctx, User]( Field("id", IDType, resolve = { ctx => ctx.value.id }), Field("name", StringType, resolve = { ctx: Context[Ctx, User] => ctx.value.name }), Field("status", userStatusType, resolve = { ctx => ctx.value.status }), Field("projects", ListType(projectType), resolve = { ctx => ProjectResolver.byUser(ctx.value) }) ) ) type User { id: ID! name: String! status: UserStatus! projects: [Project!]! } 0CKFDU5ZQF 44 <">Λ-JTU5ZQF "5ZQF Ͱදݱ OPOOVMMͳ1SPKFDUͷ
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45. implicit val userType: ObjectType[Ctx, User] = ObjectType(name = "User", fields

    = fields[Ctx, User]( Field("id", IDType, resolve = { ctx => ctx.value.id }), Field("name", StringType, resolve = { ctx: Context[Ctx, User] => ctx.value.name }), Field("status", userStatusType, resolve = { ctx => ctx.value.status }), Field("projects", ListType(projectType), resolve = { ctx => ProjectResolver.byUser(ctx.value) }) ) ) type User { id: ID! name: String! status: UserStatus! projects: [Project!]! } 0CKFDU5ZQF 45 SFTPMWFؔ਺ͷதͰ%#ΞΫηεͳͲͯ͠
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46. implicit val userType: ObjectType[Ctx, User] = ObjectType(name = "User", fields

    = fields[Ctx, User]( Field("id", IDType, resolve = { ctx => ctx.value.id }), Field("name", StringType, resolve = { ctx: Context[Ctx, User] => ctx.value.name }), Field("status", userStatusType, resolve = { ctx => ctx.value.status }), Field("projects", ListType(projectType), resolve = { ctx => ProjectResolver.byUser(ctx.value) }) ) ) 0CKFDU5ZQF 46 6TFSOBNFΛऔಘ͢Δ2VFSZΛॻ͘ͱɺ
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47. implicit val userType: ObjectType[Ctx, User] = ObjectType(name = "User", fields

    = fields[Ctx, User]( Field("id", IDType, resolve = { ctx => ctx.value.id }), Field("name", StringType, resolve = { ctx: Context[Ctx, User] => ctx.value.name }), Field("status", userStatusType, resolve = { ctx => ctx.value.status }), Field("projects", ListType(projectType), resolve = { ctx => ProjectResolver.byUser(ctx.value) }) ) ) 0CKFDU5ZQF 47 %#ΞΫηε͕ඞཁʹͳΔϑΟʔϧυ͕͋ͬͯ΋
    ͦͷϑΟʔϧυΛऔಘ͠ͳ͍ͳΒSFTPMWFؔ਺͕࣮ߦ͞ Εͣ%#ΞΫηε΋ൃੜ͠ͳ͍

48. 0CKFDU5ZQF w ఆ͕ٛΊΜͲ͍͘͞ʁ 48 implicit val userType: ObjectType[Ctx, User] =

    ObjectType(name = "User", fields = fields[Ctx, User]( Field("id", IDType, resolve = { ctx => ctx.value.id }), Field("name", StringType, resolve = { ctx: Context[Ctx, User] => ctx.value.name }), Field("status", userStatusType, resolve = { ctx => ctx.value.status }), Field("projects", ListType(projectType), resolve = { ctx => ProjectResolver.byUser(ctx.value) }) ) )

49. 0CKFDU5ZQF w ͦ͜ͰϚΫϩ
    w DBTF
    DMBTTͳΒ͍͍ײ͡ʹղܾͯ͘͠ΕΔ
    w ґଘ͢Δଞͷಠࣗܕ͸JNQMJDJUͰએݴ͓ͯ͘͜͠ͱ
    w ࠓճͳΒQSPKFDU5ZQFͱ͔ import

    sangria.macros.derive val userType: ObjectType[Ctx, User] = derive.deriveObjectType() 49

50. &OVN5ZQF val userStatusType = EnumType[UserStatus]( "UserStatus", values = List( EnumValue[UserStatus]("Active",

    value = UserStatus.Active), EnumValue[UserStatus]("Paused", value = UserStatus.Paused) ) ) enum UserStatus { Active Paused } sealed abstract class UserStatus(val value: Int) object UserStatus { case object Active extends UserStatus(1) case object Paused extends UserStatus(2) } 50

51. &OVN5ZQF΋ϚΫϩͰ val userStatusType: EnumType[UserStatus] = derive.deriveEnumType[UserStatus]() enum UserStatus { Active

    Paused } sealed abstract class UserStatus(val value: Int) object UserStatus { case object Active extends UserStatus(1) case object Paused extends UserStatus(2) } 51

52. w &OVN5ZQF΋ϚΫϩͰಋग़Ͱ͖Δ
    w ATFBMFEAͱAPCKFDUAͷ૊Έ߹Θͤ &OVN5ZQF΋ϚΫϩͰ val userStatusType: EnumType[UserStatus] = derive.deriveEnumType[UserStatus]()

    sealed abstract class UserStatus(val value: Int) object UserStatus { case object Active extends UserStatus(1) case object Paused extends UserStatus(2) } 52

53. w ީิʹͳΔܕ 0CKFDU5ZQF Λ-JTUͰ༩͑Δ 6OJPO
    5ZQF union Plan = Free |

    Standard | Enterprise object Plan { case class Free(startDate: ZonedDateTime) case class Standard(startDate: ZonedDateTime) case class Enterprise(userLimit: Int, startDate: ZonedDateTime) } implicit val planType: UnionType[Ctx] = { val free = derive.deriveObjectType[Ctx, Plan.Free]() val standard = derive.deriveObjectType[Ctx, Plan.Standard]() val enterprise = derive.deriveObjectType[Ctx, Plan.Enterprise]() UnionType("Plan", types = free :: standard :: enterprise :: Nil) } 53

54. w ೖྗ஋ͱͯ͠+40/Λड͚औΔͨΊͷ΍ͭ
    w +40/Ͱड͚औͬͯ4DBMBͷΦϒδΣΫτʹม׵ *OQVU0CKFDU5ZQF mutation { UpdateTask(attributes: { taskId:

    "t1", taskName: "newName" }) { id } } case class UpdateTaskParam(taskId: String, taskName: Option[String], taskDescription: Option[String], assignedTo: Option[String]) 54

55. w ͍ͭ͜΋ϚΫϩͰࣗಈಋग़ग़དྷΔ *OQVU0CKFDU5ZQF case class UpdateTaskParam(taskId: String, taskName: Option[String], taskDescription:

    Option[String], assignedTo: Option[String]) 55 implicit val paramJson = jsonFormat4(UpdateTaskParam.apply) val param = derive.deriveInputObjectType[UpdateTaskParam]() mutation { UpdateTask(attributes: { taskId: "t1", taskName: "newName" }) { id } }

56. w &YFDVUPSʹεΩʔϚɺ࣮ߦ͍ͨ͠ΫΤϦɺ$POUFYU ͳͲΛ༩͑Δͱ+40/Λฦͯ͘͠ΕΔ (SBQI2-ͷ࣮ߦ val result: Future[JsValue] = Executor.execute[Ctx, Unit,

    JsObject]( schema, document, context ) 56 w ఆٛͨ͠(SBQI2-εΩʔϚ
    w ϦΫΤετͷ+40/Λύʔεͨ݁͠Ռ
    w ࣮ߦ͢ΔͨΊͷDPOUFYU

57. 4DBMBͰͷ(SBQI2- w 4DBMBͱ૬ੑόπάϯ
    w ڧྗͳܕγεςϜͰ(SBQI2-ͷܕΛදݱ
    w ϚΫϩͰϘΠϥʔϓϨʔτ΋࡟ݮ
    w σϑΥϧτOPOOVMM࠷ߴ
    w

    0QUJPOΛ͚ͭͳ͍ͱOVMMBCMFʹͳΒͳ͍
    w +40/ͱͷ૬ޓม׵
    w DBTF
    DMBTT͕͋ΔͷͰࣗಈಋग़Ͱ͖Δ
    w TBOHSJBͷ͓͔͛Ͱे෼ઓ͑Δ 57

58. (SBQI2-ͷ࣮ફ 58

59. (SBQI2-Ͱͷ࣮ફฤ w (SBQI2-Λ4DBMB4BOHSJBͰͲ͏࣮૷͍ͯ͠Δ͔
    w ͋͘·Ͱ͜͏΍࣮ͬͯફ͍ͯ͠Δɺͱ͍͏࿩
    w ͍Ζ͍Ζ೰ΈϙΠϯτ΋ଟ͍
    w (SBQI2-ͳΒͰ͸ͷ೰Έ΋͋Δ
    w

    খ͍͞΋ͷ͔Βେ͖͍΋ͷ·Ͱ͍Ζ͍Ζ 59

60. (SBQI2-Ͱͷ࣮ફฤ w ΞʔΩςΫνϟ
    w εΩʔϚͷઃܭ
    w $POUFYUΛͲ͏͢Δ͔
    w ೝূɺೝՄΛͲ͏͢Δ͔
    w

    τϥϯβΫγϣϯ
    w ΤϥʔϋϯυϦϯά
    w / ໰୊
    w FUD 60

61. ΞʔΩςΫνϟ 61

62. ΞʔΩςΫνϟ w ϓϩάϥϛϯάϨϕϧͰͷઃܭ
    w (SBQI2-ʹͲ͜·Ͱ੹຿Λ೚ͤΔ͔
    w ͲΜͳײ͡Ͱ࡞Δͷ͕͍͍ͷ͔ 62

63. ΞʔΩςΫνϟ HTTP GraphQL Business Logic Database Access 63

64. w (SBQI2-͸)551ϨΠϠͱϏδωεϩδοΫͷؒ ΛऔΓ࣋ͭଘࡏͱͯ͠ઃܭ͢Δͷ͕ྑ͍
    w (SBQI2-͸͋͘·Ͱ*'ͱͯ͠ར༻͢Δ ΞʔΩςΫνϟ HTTP GraphQL Business Logic

    Database Access 64

65. w (SBQI2-࡞ऀͷ-FF
    #ZSPOࢯ΋ݴ͍ͬͯΔ
    w ೝূೝՄɺΩϟογϡ΍%#ΫΤϦͳͲ͸ (SBQI2-ϨΠϠͰ͸ͳͦ͘ͷԼͰ΍Δ΂͖
    w ަ׵Մೳੑ্͕͕ͬͯকདྷ໾ʹཱͭ ΞʔΩςΫνϟ 65 https://www.youtube.com/watch?v=zVNrqo9XGOs

66. w (SBQI2-ͷར఺͸2VFSZʹ͋ΒΘΕΔ
    w ΫϥΠΞϯτͷཁٻʹԠ͑Δॊೈͳ2VFSZ
    w .VUBUJPO͸ਖ਼௚ͦ͜·Ͱʜ ΞʔΩςΫνϟ 66

67. w $234
    w $PNNBOE2VFSZ
    3FTQPOTJCJMJUZ
    4FHSFHBUJPO ΞʔΩςΫνϟ 67 https://docs.microsoft.com/ja-jp/azure/architecture/guide/architecture-styles/cqrs

68. ΞʔΩςΫνϟ HTTP GraphQL Business Logic Database Access 68

69. ΞʔΩςΫνϟ 69 HTTP GraphQL UseCase/Application Database Access(DAO) Query Mutation Domain

    3FQPTJUPSZ Resolver

70. w $234Λ؆ུԽͯ͠࠾༻͍ͯ͠Δ
    w ߋ৽ܥ͸%%%Ͱ͖ͬͪΓϞσϦϯά࣮૷
    w ࢀরܥ͸TFMFDUͨ͠σʔλΛՃ޻͢Δ͚ͩ
    w (SBQI2-ͷ2VFSZ͸ͲΜͳσʔλΛඞཁͱ͞ΕΔ ͔ɺݺͼग़͞ΕΔ·ͰΘ͔Βͳ͍
    w

    %%%
    3FQPTJUPSZ͸ݫ͍͠
    w ఘΊ΋େࣄ
    w %BUB"DDFTT0CKFDUΛ࢖͏ ΞʔΩςΫνϟ 70

71. w ͱ͸͍͑2VFSZܥͷSFTPMWFͰ%"0Λ௚઀ݺͿͱɺ %"0 ЋͳॲཧΛͨ͘͠ͳͬͨ࣌ʹࠔΔ
    w ΩϟογϡೖΕͨΓϖʔδωʔγϣϯͨ͠Γ
    w 3FTPMWFS૚Λ༻ҙ͓ͯ͘͠ͱྑ͍
    w ಺෦Ͱ͸%"0

    Ћఔ౓
    w SFTPMWFؔ਺͔Β࢖ΘΕΔ ΞʔΩςΫνϟ 71

72. w 3FTPMWFSͷ࣮૷ྫ ΞʔΩςΫνϟ 72 Field("users", ListType(userType), resolve = { ctx

    => UserResolver.all()(ctx.ctx) }) object UserResolver { def all()(implicit ctx: GraphQLContext): Future[Seq[User]] = { withCache("user#all") { UserDao.findAll() } } }

73. εΩʔϚ 73

74. εΩʔϚ w ΫϥΠΞϯτʹͲΜͳεΩʔϚΛఏڙ͢Δ͔
    w 3&45GVMͳ"1*ʹ͓͚Δ63-ઃܭʹ͍ۙ
    w ·͞ʹϦιʔεઃܭ
    w εΩʔϚͷେ͖ͳ෼͚ํ
    w

    ࢀরܥ͸2VFSZ
    w ߋ৽ܥ͸.VUBUJPO 74

75. εΩʔϚ 2VFSZ w SPPUϨϕϧ͸ඇৗʹॏཁ
    w ʮ(SBQI2-͸ΫϥΠΞϯτ͕ඞཁͳσʔλ͚ͩ Λબ୒ͯ͠औಘ͢Δ͜ͱ͕ग़དྷΔʯͷى఺
    w ͔͜͜Βؔ࿈Λ୧͍ͬͯ͘͜ͱʹͳΔ type

    Query { projects: [Project!]! tasks(status: TaskStatus): [Task!]! users(arg: UserSearchCondition): [User!]! } 75

76. εΩʔϚ 2VFSZ w AWJFXFSA
    w ϦΫΤετ͖ͯͨ͠Ϣʔβࣗ਎ʹඥͮ͘৘ใ
    w ࣗ෼ࣗ਎ΛOPOOVMMͰఏڙͨ͠Γ type Query

    { projects: [Project!]! tasks: [Task!]! users: [User!]! viewer: ViewerQuery! } type ViewerQuery { self: User! assignedTasks: [Task!]! belongsTo: [Project!]! } 76

77. εΩʔϚ 2VFSZ w AWJFXFSA
    w ϦΫΤετ͖ͯͨ͠Ϣʔβࣗ਎ʹඥͮ͘৘ใ
    w ࣗ෼ࣗ਎ΛOPOOVMMͰఏڙͨ͠Γ
    w (JUIVC
    WΛύΫΔ

    77

78. εΩʔϚ .VUBUJPO w શͯSPPUϨϕϧʹฒ΂Δͷ͕Φεεϝ
    w ωετͨ͠.VUBUJPO͸࣮ߦॱং͕อূ͞Εͳ͍ mutation { CreateTask(…) {

    id } UpdateTask(…) { id } // CreateTaskͷޙʹ࣮ߦ͞ΕΔ } mutation { Task { Create(…) { id } Update(…) { id } // Createͷޙʹ࣮ߦ͞ΕΔอূ͸ͳ͍ } } 78

79. εΩʔϚ .VUBUJPO w "SHVNFOUͱ*OQVU0CKFDU5ZQF͸͓޷ΈͰྑͦ͞͏
    w 63-ύϥϝʔλ
    PS
    +40/ͷΠϝʔδ
    w *OQVU0CKFDU5ZQF͸DBTF
    DMBTTʹύʔεग़དྷͯศར 79 *OQVU0CKFDU5ZQF

    "SHVNFOU

80. όʔδϣχϯά 80

81. όʔδϣχϯά w Α͋͘Δޡղ
    w ʮ(SBQI2-ͩͱόʔδϣχϯά͠ͳͯ͘Α͍ʯ 81

82. όʔδϣχϯά w "1*ͷύεͱͯ͠όʔδϣχϯά͸ෆཁ
    w WHSBQIRM
    w WHSBQIRM 82 "

83. όʔδϣχϯά w εΩʔϚͷόʔδϣχϯά͸ඞཁ
    w ϑΟʔϧυͷ௥ՃͷΈɺͩͱෆཁ
    w มߋ͸!EFQFSFDBUFE͚ͭͯɺมߋޙͷϑΟʔϧ υผ໊Ͱ௥Ճɺ͠͹Βͨ͘͠ΒมߋલͷΛফ͢
    w ࡟আ͸!EFQFSFDBUFE͚ͭͯ͠͹Βͨ͘͠Βফ͢
    

    w %#ͷεΩʔϚͱಉ͡Α͏ͳϑϩʔ
    w ϑΟʔϧυ໊͸ඇৗʹॏཁ
    w มߋͮ͠Β͍ɺͱ͍͏ͷΛ೦಄ʹஔ͍͓ͯ͘ 83

84. όʔδϣχϯά w 'JFMEʹAEFQSFDBUFE3FBTPOAΛ༩͑Δ 84 Field("name", StringType, resolve = { ctx

    => ctx.value.name }), Field("displayName", StringType, deprecationReason = Some("use `name` instead"), resolve = { ctx => ctx.value.name }),

85. (SBQI2-ʹ͓͚Δ
    $POUFYU 85

86. val userType: ObjectType[Ctx, User] = ObjectType[Ctx, User]( "User", fields[Ctx, User](

    Field("id", IDType, resolve = { _.value.id }), Field("name", StringType, resolve = { ctx: Context[Ctx, User] => ctx.value.name }), Field("status", userStatusType, resolve = { _.value.status }), Field("projects", ListType(projectType), resolve = { ctx => ProjectResolver.byIds(ctx.value.projectIds)(ctx.ctx) }) ) ) 0CKFDU5ZQF 86

87. (SBQI2-ʹ͓͚Δ$POUFYU w (SBQI2-ͷܕʹ͓͚ΔSFTPMWFΛఆٛ͢Δࡍʹొ৔ ͢Δ$POUFYUʹԿΛ࣋ͨͤΔ͔
    w ʮ$POUFYUʯͱ͍͏໊લ͕೉͍͠
    w DPOUFYUVBMͳ৘ใͬͯԿʁ 87

88. (SBQI2-ʹ͓͚Δ$POUFYU w ྫϩάΠϯதͷϢʔβ΍%#΁ͷΞΫηεΛ࣋ͭ context
    "
    WBMVF
    XIJDI
    JT
    QSPWJEFE
    UP
    FWFSZ
    SFTPMWFS
    BOE
    IPMET
    JNQPSUBOU
    DPOUFYUVBM
    JOGPSNBUJPO
    MJLF
    UIF
    DVSSFOUMZ
    MPHHFE
    JO
    VTFS
    PS
    BDDFTT
    UP
    B
    EBUBCBTF
    IUUQTHSBQIRMPSHMFBSOFYFDVUJPOSPPUpFMETSFTPMWFST 88

89. (SBQI2-ʹ͓͚Δ$POUFYU w %#ΞΫηεՄೳͳ4FSWJDF3FQPTJUPSZͳͲ 89 IUUQTTBOHSJBHSBQIRMPSHMFBSOJOQVUBOEDPOUFYUPCKFDUT

90. (SBQI2-ʹ͓͚Δ$POUFYU w ͳΔ΄Ͳɺ%"0΍4FSWJDF΍3FQPTJUPSZΛ$POUFYU ͔ΒΞΫηεग़དྷΔΑ͏ʹͨ͠Βྑ͍Μͩͳʂ 90

91. (SBQI2-ʹ͓͚Δ$POUFYU w ͳΔ΄Ͳɺ%"0΍4FSWJDF΍3FQPTJUPSZΛ$POUFYU ͔ΒΞΫηεग़དྷΔΑ͏ʹͨ͠Βྑ͍Μͩͳʂ 91 ͓͢͢Ί͠ͳ͍

92. (SBQI2-ʹ͓͚Δ$POUFYU w %"0͕શͯͷϑΟʔϧυ͔Β$POUFYUܦ༝Ͱ޷͖ উखʹΞΫηεग़དྷΔΑ͏ʹͳͬͯ͠·ͬͯϨΠ Ϡʔ͕յΕΔ
    w SFTPMWFؔ਺ͰશͯΛ΍ͬͯ͠·͑Δঢ়ଶʹ
    w ݁Ռͱͯ͠(SBQI2-ϨΠϠ͕ް͘ͳΔ 92

93. (SBQI2-ʹ͓͚Δ$POUFYU w $POUFYU͸ಉҰϦΫΤετ಺Ͱڞ௨ͯ͠ࢀরՄೳ
    w (SBQI2-ΫΤϦͷ࣮ߦ୯Ґ ϦΫΤετ Ͱڞ௨͠ ͯࢀর͍ͨ͠΋ͷΛ࣋ͨͤΔ΂͖
    w ϩάΠϯϢʔβ
    

    w τϥϯβΫγϣϯ
    w &YFDVUJPO$POUFYU
    w FUD 93

94. w $POUFYUͷ࣮૷ྫ
    w ϩάΠϯϢʔβ
    w τϥϯβΫγϣϯ %#4FTTJPO
    w &YFDVUJPO$POUFYU

    class GraphQLContext( userOpt: Option[User], session: DBSession, ec: ExecutionContext ) (SBQI2-ʹ͓͚Δ$POUFYU 94

95. ೝূೝՄ 95

96. ೝূೝՄ w 8FCΞϓϦέʔγϣϯͳΒେମ͋Δ΍ͭ
    w ೝূ "VUIFOUJDBUJPO
    w ୭͔Λಛఆ͢Δ
    w

    ೝՄ "VUIPSJ[BUJPO
    w ݖݶΛ֬ೝ͢Δ
    w (SBQI2-ͱͲ͏૊Έ߹ΘͤΔ΂͖͔ɺͱ͍͏࿩ 96

97. ೝূ w ೝূͨ݁͠Ռ͸શମͰ࢖͍ճ͍ͨ͠
    w ෳ਺ͷ2VFSZ.VUBUJPOΛಉ࣌ʹ࣮ߦ͢Δࡍʹɺ ผʑʹೝূΛ͢Δͷ͸ྲྀੴʹڐ༰Ͱ͖ͳ͍
    w ೝূॲཧͦͷ΋ͷ͸(SBQI2-ͱ͸ؔ܎ͳ͍
    w $PPLJF࢖͓͏͕+85࢖͓͏͕͓޷͖ʹ

    97

98. ೝূ w (SBQI2-ͷ$POUFYUΛ࡞੒͢ΔࡍʹೝূΛߦ͏
    w ೝূ݁ՌΛ$POUFYUʹೖΕͯ͠·͑͹ڞ༗ग़དྷΔ 98 object GraphQLContext { def

    create(userIdOpt: Option[String])( implicit ec: ExecutionContext, s: DBSession): GraphQLContext = { userIdOpt.flatMap { userId => authenticate(userId).map { user => new GraphQLContext(Some(user), ec, s) } } getOrElse { new GraphQLContext(None, ec, s) } } private def authenticate(userId: String): Option[User] = ??? } GBDUPSZͰೝূͭͭ͠ੜ੒

99. ೝূ w ೝূΛඞཁͱ͢Δ2VFSZ.VUBUJPOΛ࣮૷͢Δ
    w ೝূॲཧͦͷ΋ͷ͸(SBQI2-ͱ͸੾Γ཭͢
    w .JEEMFXBSF͕࢖͏ͱڧ੍Ͱ͖ͯศར
    w ΫΤϦ࣮ߦͷCFGPSFBGUFSʹॲཧΛࠩ͠ࠐΊΔ
    w

    TBOHSJBFYFDVUJPO഑ԼͷΫϥεΛར༻͢Δ
    w 'JFME5BH
    w .JEEMFXBSF.JEEMFXBSF#FGPSF'JFME 99

100. w ೝূඞਢʹ͍ͨ͠pFMEͷఆٛʹUBHΛ෇༩͢Δ
     w &YFDVUPSFYFDVUFʹNJEEMFXBSFͱͯ͠ "VUIFOUJDBUJPO'JMUFSΛ༩͑Ε͹ಈ͘ ೝূ val self: Field[Ctx, User]

     = Field( "self", userType, tags = Middlewares.RequireAuthentication :: Nil, resolve = { ctx => ctx.ctx.loggedInUser } ) ೝূඞਢͳ͜ͱΛλάͰ໌ࣔ Executor.execute[Ctx, Unit, JsObject]( schema, queryDocument, context, middleware = AuthenticationFilter :: Nil ) 100

101. ೝূ type Ctx = GraphQLContext case object RequireAuthentication extends FieldTag

     object AuthenticationFilter extends MiddlewareBeforeField[Ctx] { override type QueryVal = Unit override type FieldVal = Unit private type MCtx = MiddlewareQueryContext[Ctx, _, _] override def beforeQuery(context: MCtx) = () override def afterQuery(queryVal: QueryVal, context: MCtx) = () override def beforeField(queryVal: QueryVal, mctx: MCtx, ctx: Context[Ctx, _]) = { if (ctx.field.tags contains RequireAuthentication) { if (!ctx.ctx.isLoggedIn) { throw AuthenticationError("must logged in!") } } continue } } 101

102. type Ctx = GraphQLContext case object RequireAuthentication extends FieldTag object

     AuthenticationFilter extends MiddlewareBeforeField[Ctx] { override type QueryVal = Unit override type FieldVal = Unit private type MCtx = MiddlewareQueryContext[Ctx, _, _] override def beforeQuery(context: MCtx) = () override def afterQuery(queryVal: QueryVal, context: MCtx) = () override def beforeField(queryVal: QueryVal, mctx: MCtx, ctx: Context[Ctx, _]) = { if (ctx.field.tags contains RequireAuthentication) { if (!ctx.ctx.isLoggedIn) { throw AuthenticationError("must logged in!") } } continue } } ೝূ ೝূඞਢͳϑΟʔϧυʹ෇༩͢Δ5BH 102

103. type Ctx = GraphQLContext case object RequireAuthentication extends FieldTag object

     AuthenticationFilter extends MiddlewareBeforeField[Ctx] { override type QueryVal = Unit override type FieldVal = Unit private type MCtx = MiddlewareQueryContext[Ctx, _, _] override def beforeQuery(context: MCtx) = () override def afterQuery(queryVal: QueryVal, context: MCtx) = () override def beforeField(queryVal: QueryVal, mctx: MCtx, ctx: Context[Ctx, _]) = { if (ctx.field.tags contains RequireAuthentication) { if (!ctx.ctx.isLoggedIn) { throw AuthenticationError("must logged in!") } } continue } } ೝূ 0CKFDU5ZQF౳ͷpFMEʹࠩ͠ࠐΉॲཧ 103

104. type Ctx = GraphQLContext case object RequireAuthentication extends FieldTag object

     AuthenticationFilter extends MiddlewareBeforeField[Ctx] { override type QueryVal = Unit override type FieldVal = Unit private type MCtx = MiddlewareQueryContext[Ctx, _, _] override def beforeQuery(context: MCtx) = () override def afterQuery(queryVal: QueryVal, context: MCtx) = () override def beforeField(queryVal: QueryVal, mctx: MCtx, ctx: Context[Ctx, _]) = { if (ctx.field.tags contains RequireAuthentication) { if (!ctx.ctx.isLoggedIn) { throw AuthenticationError("must logged in!") } } continue } } ೝূ 3FRVJSF"VUIFOUJDBUJPOλά͕෇͍ͯΔͷʹ ϩάΠϯͯ͠ͳ͍৔߹͸ྫ֎Λૹग़ 104

105. ೝՄ w ೝՄ͸ΞϓϦέʔγϣϯ૚Ͱߦ͏
     w (SBQI2-ʹ͸ؔ܎ͳ͍࿩ͳͷͰׂѪ 105

106. %#τϥϯβΫγϣϯ 106

107. %#τϥϯβΫγϣϯ w Ͳͷ୯ҐͰτϥϯβΫγϣϯΛ࣮ߦ͢Δ͔
     w ͍ͭ#FHJO͍ͯͭ͠$PNNJU3PMMCBDL͢Δ͔
     w (SBQI2-ΫΤϦ͸ෳ਺ͷ2VFSZ.VUBUJPOΛ·ͱ Ί࣮ͯߦ͢Δ͜ͱ͕ग़དྷΔ
     w ಛʹ.VUBUJPO͸ߋ৽ܥͳͷͰτϥϯβΫγϣϯ

     Λผʑʹ͍ͨ͠ͱ͍͏ཉٻ͸͋Δ͸ͣ 107

108. %#τϥϯβΫγϣϯ w ݁࿦ɺϦΫΤετʹରͯ͠τϥϯβΫγϣϯ
     w ຊ౰ʹτϥϯβΫγϣϯΛผʹ͍ͨ͠ૢ࡞ΛϦ ΫΤετʹ৐ͤͯ·ͱΊ࣮ͯߦ͢Δ͜ͱ͕͋Δ ͩΖ͏͔ʁ 108

109. %#τϥϯβΫγϣϯ w τϥϯβΫγϣϯͷ੹຿͕(SBQI2-ϨΠϠʹʜ
     w $POUFYUʹ࣋ͨͤͯΫΤϦؒͰڞ༗͢Δ
     w ઃܭతʹ͸ͪΐͬͱඍົͳؾ࣋ͪ
     w ԿΛ༏ઌ͢Δ͔Ͱܾఆ͢Δ΂͖ 109

110. ΤϥʔϋϯυϦϯά 110

111. ΤϥʔϋϯυϦϯά w (SBQI2-Ͱ͸εςʔλείʔυ͸جຊతʹ
     w Τϥʔ͸ϨεϙϯεϘσΟʹೖΕͯฦ٫͞ΕΔ 111

112. ΤϥʔϋϯυϦϯά w ෳ਺ͷ2VFSZ.VUBUJPOΛ࣮ߦͨ͠ࡍʹɺͲΕ͔
     
     ͭͰ΋ࣦഊͨ͠Βશମ͕Τϥʔʹͳͬͯ͠·͏ ͱ͍͏໰୊͕͋Δ
     w ྫɿτοϓϖʔδͷදࣔʹඞཁͳϦιʔεΛ· ͱΊͯऔಘͨ͠ΒɺҰ෦෼͚ͩऔಘʹࣦഊͨ͠ ͚ͩͰશମ͕ਅͬനʹͳΔ
     w

     ϚΠΫϩαʔϏε࣌୅ʹ͙ͦΘͳ͍ײ
     w #''ʹ࢖͍ਏ͍ʜ 112

113. ΤϥʔϋϯυϦϯά w ͍Ζ͍Ζબ୒ࢶ͸͋Δ
     w શ෦औಘͰ͖ͳ͍ͱҙຯແ͍୯ҐͰΫΤϦൃߦ
     w গʑࣦഊͯ͠΋ϦτϥΠ͢Ε͹͑͑΍Μ
     w FUD
     w

     ੒ޭࣦഊΛಉډͤ͞Δͷ͸͔ͳΓେมͦ͏
     w 6OJPO5ZQFʹͯ͠੒ޭࣦഊΛදݱ͢Δͱ͔ʁ
     w SFTPMWFͰྫ֎͕౤͛ΒΕͳ͍Α͏ʹέΞ͕ඞཁ 113

114. ΤϥʔϋϯυϦϯά w ͰɺͲ͏͍ͯ͠Δ͔
     w Ұ෦ͷΤϥʔΛશମͷΤϥʔͱ͍ͯ͠Δ
     w ࣮૷ίετͱͷ݉Ͷ߹͍
     w Ұ෦Ͱ΋ࣦഊ͢ΔͷͬͯԿ͔͕͓͔͍͠
     w

     #''ͳΒಛఆͷΞϓϦ͕ෆ௨ʹͳΔՄೳੑ΋
     w ୯ҰΞϓϦͳΒ૝ఆ͢Δඞཁͳ͍ 114

115. ΤϥʔϋϯυϦϯά w Τϥʔͷछྨ͚ͩΘ͔ΔΑ͏ʹ
     w ϦΫΤετෆਖ਼αʔόΤϥʔೝূΤϥʔ sealed abstract class ErrorType(val value:

     String) object ErrorType { case object BadRequest extends ErrorType("BadRequest") case object ServerError extends ErrorType("ServerError") case object AuthError extends ErrorType("AuthError") } implicit val error = derive.deriveEnumType[ErrorType]() 115

116. ΤϥʔϋϯυϦϯά w Τϥʔͷछྨ͚ͩΘ͔ΔΑ͏ʹ
     w ϦΫΤετෆਖ਼αʔόΤϥʔೝূΤϥʔ sealed abstract class ErrorType(val value:

     String) object ErrorType { case object BadRequest extends ErrorType("BadRequest") case object ServerError extends ErrorType("ServerError") case object AuthError extends ErrorType("AuthError") } implicit val error = derive.deriveEnumType[ErrorType]() def handleException(m: ResultMarshaller, msg: String, tp: ErrorType) = HandledException( msg, additionalFields = Map("type" -> m.enumNode(tp.value, error.name)), addFieldsInExtensions = false, addFieldsInError = true ) )BOEMFE&YDFQUJPOΛ࢖͑͹
     (SBQI2-ͬΆ͍ΤϥʔϝοηʔδΛฦ٫Ͱ͖Δ 116

117. ΤϥʔϋϯυϦϯά w Τϥʔͷछྨ͚ͩΘ͔ΔΑ͏ʹ
     w ϦΫΤετෆਖ਼αʔόΤϥʔೝূΤϥʔ sealed abstract class ErrorType(val value:

     String) object ErrorType { case object BadRequest extends ErrorType("BadRequest") case object ServerError extends ErrorType("ServerError") case object AuthError extends ErrorType("AuthError") } implicit val error = derive.deriveEnumType[ErrorType]() def handleException(m: ResultMarshaller, msg: String, tp: ErrorType) = HandledException( msg, additionalFields = Map("type" -> m.enumNode(tp.value, error.name)), addFieldsInExtensions = false, addFieldsInError = true ) 117

118. ΤϥʔϋϯυϦϯά w ϋϯυϦϯά͢Δ΂͖Τϥʔ͕ଟ͍
     w +40/ͷTZOUBYΤϥʔ
     w ΫΤϦͷTZOUBYΤϥʔɺWBMJEBUJPOΤϥʔ
     w ϏδωεϩδοΫ্ͷΤϥʔ
     w

     ͦͷଞɺUISPX͞ΕͨΤϥʔ
     w Ͳ͏΍ͬͯϋϯυϦϯά͢Δʁ
     w &YDFQUJPO)BOEMFSΛؤு࣮ͬͯ૷͢Δ
     w &YFDVUPSFYFDVUFͷSFDPWFSͰ΋ؤுΔ 118

119. ΤϥʔϋϯυϦϯά private val exceptionHandler = { def handleException(m: ResultMarshaller, msg:

     String, tp: ErrorType) = HandledException( msg, additionalFields = Map("type" -> m.enumNode(tp.value, errorType.name)), addFieldsInExtensions = false, addFieldsInError = true ) val onException: PartialFunction[(ResultMarshaller, Throwable), HandledException] = { case (m, qa: QueryAnalysisError) => logger.warn(s"QueryAnalysisError occurred. msg = ${qa.getMessage}") handleException(m, qa.getMessage, ErrorType.BadRequest) case (m, se: SyntaxError) => logger.info(s"SyntaxError occurred. msg = ${se.getMessage()}") handleException(m, se.getMessage, ErrorType.BadRequest) case (m, ewr: ErrorWithResolver) => logger.error(s"ErrorWithResolver occurred. msg = ${ewr.getMessage}", ewr) handleException(m, ewr.getMessage, ErrorType.ServerError) case (m, AuthenticationError(msg)) => logger.info(s"AuthenticationError occurred. msg = ${msg}") handleException(m, msg, ErrorType.BadRequest) case (m, NotFoundException(msg)) => logger.info(s"NotFoundException occurred. msg = ${msg}") handleException(m, msg, ErrorType.BadRequest) case (m, t: Throwable) => logger.error(s"unknown server error occurred. msg = ${t.getMessage}", t) handleException(m, t.getMessage, ErrorType.ServerError) } val onViolation: PartialFunction[(ResultMarshaller, Violation), HandledException] = { case (m, v) => logger.warn(s"Violation error occurred. msg = ${v.errorMessage}") handleException(m, v.errorMessage, ErrorType.BadRequest) } val onUserFacingError : PartialFunction[(ResultMarshaller, UserFacingError), HandledException] = { case (m, v: WithViolations) => logger.warn(s"WithViolations occurred. msg = ${v.getMessage()}") handleException(m, v.getMessage, ErrorType.BadRequest) case (m, ie: InternalError) => logger.error(s"InternalError occurred. msg = ${ie.getMessage()}", ie) handleException(m, ie.getMessage, ErrorType.ServerError) case (m, ee: ExecutionError) => logger.error(s"ExecutionError occurred. msg = ${ee.getMessage()}", ee) handleException(m, ee.getMessage, ErrorType.ServerError) case (m, ufe) => logger.warn(s"UserFacingError occurred. msg = ${ufe.getMessage()}") handleException(m, ufe.getMessage, ErrorType.BadRequest) } ExceptionHandler(onException, onViolation, onUserFacingError) } Future.fromTry(QueryParser.parse(document)) zip GraphQLContext.create(userIdOpt) flatMap { case (queryDocument: Document, context: GraphQLContext) => val result: Future[JsValue] = Executor.execute[Ctx, Unit, JsObject]( schema, queryDocument, context, exceptionHandler = exceptionHandler, operationName = operation, variables = vars, middleware = Middlewares.value ) result .map { jsValue => OK -> jsValue } .recover { case error: QueryAnalysisError => BadRequest -> error.resolveError case error: ErrorWithResolver => InternalServerError -> error.resolveError } } recover { case v: SyntaxError => BadRequest -> new Exception(v.getMessage()) with ErrorWithResolver with WithViolations { override def exceptionHandler: ExceptionHandler = GraphQLServer.exceptionHandler override def violations: Vector[Violation] = Vector.empty }.resolveError case v: ValidationError => BadRequest -> v.resolveError case NonFatal(t) => InternalServerError -> InternalError(t, GraphQLServer.exceptionHandler).resolveError } 119

120. ΤϥʔϋϯυϦϯά private val exceptionHandler = { def handleException(m: ResultMarshaller, msg:

     String, tp: ErrorType) = HandledException( msg, additionalFields = Map("type" -> m.enumNode(tp.value, errorType.name)), addFieldsInExtensions = false, addFieldsInError = true ) val onException: PartialFunction[(ResultMarshaller, Throwable), HandledException] = { case (m, qa: QueryAnalysisError) => logger.warn(s"QueryAnalysisError occurred. msg = ${qa.getMessage}") handleException(m, qa.getMessage, ErrorType.BadRequest) case (m, se: SyntaxError) => logger.info(s"SyntaxError occurred. msg = ${se.getMessage()}") handleException(m, se.getMessage, ErrorType.BadRequest) case (m, ewr: ErrorWithResolver) => logger.error(s"ErrorWithResolver occurred. msg = ${ewr.getMessage}", ewr) handleException(m, ewr.getMessage, ErrorType.ServerError) case (m, AuthenticationError(msg)) => logger.info(s"AuthenticationError occurred. msg = ${msg}") handleException(m, msg, ErrorType.BadRequest) case (m, NotFoundException(msg)) => logger.info(s"NotFoundException occurred. msg = ${msg}") handleException(m, msg, ErrorType.BadRequest) case (m, t: Throwable) => logger.error(s"unknown server error occurred. msg = ${t.getMessage}", t) handleException(m, t.getMessage, ErrorType.ServerError) } val onViolation: PartialFunction[(ResultMarshaller, Violation), HandledException] = { case (m, v) => logger.warn(s"Violation error occurred. msg = ${v.errorMessage}") handleException(m, v.errorMessage, ErrorType.BadRequest) } val onUserFacingError : PartialFunction[(ResultMarshaller, UserFacingError), HandledException] = { case (m, v: WithViolations) => logger.warn(s"WithViolations occurred. msg = ${v.getMessage()}") handleException(m, v.getMessage, ErrorType.BadRequest) case (m, ie: InternalError) => logger.error(s"InternalError occurred. msg = ${ie.getMessage()}", ie) handleException(m, ie.getMessage, ErrorType.ServerError) case (m, ee: ExecutionError) => logger.error(s"ExecutionError occurred. msg = ${ee.getMessage()}", ee) handleException(m, ee.getMessage, ErrorType.ServerError) case (m, ufe) => logger.warn(s"UserFacingError occurred. msg = ${ufe.getMessage()}") handleException(m, ufe.getMessage, ErrorType.BadRequest) } ExceptionHandler(onException, onViolation, onUserFacingError) } Future.fromTry(QueryParser.parse(document)) zip GraphQLContext.create(userIdOpt) flatMap { case (queryDocument: Document, context: GraphQLContext) => val result: Future[JsValue] = Executor.execute[Ctx, Unit, JsObject]( schema, queryDocument, context, exceptionHandler = exceptionHandler, operationName = operation, variables = vars, middleware = Middlewares.value ) result .map { jsValue => OK -> jsValue } .recover { case error: QueryAnalysisError => BadRequest -> error.resolveError case error: ErrorWithResolver => InternalServerError -> error.resolveError } } recover { case v: SyntaxError => BadRequest -> new Exception(v.getMessage()) with ErrorWithResolver with WithViolations { override def exceptionHandler: ExceptionHandler = GraphQLServer.exceptionHandler override def violations: Vector[Violation] = Vector.empty }.resolveError case v: ValidationError => BadRequest -> v.resolveError case NonFatal(t) => InternalServerError -> InternalError(t, GraphQLServer.exceptionHandler).resolveError } ΍Δ͔͠ͳ͍ 120

121. / ໰୊ 121

122. / ໰୊ w (SBQI2-Ͱ͸ϦΫΤετΛճʹݻఆͰ͖Δ
     w ؔ࿈Λ୧ͬͯඞཁͳσʔλΛऔಘ͢Δ
     w ݁Ռͱͯ͠/ ͳ42-͕ൃߦ͞Ε͕ͪ 122

123. / ໰୊ QSPKFDU͕/ݸ͋Ε͹
     VTFST΋/ճऔಘ͢Δɺ ·͞ʹ/ ͳঢ়ଶ 123

124. / ໰୊ w / Λճආ͢ΔͨΊͷ࢓૊Έ͕ఏڙ͞Ε͍ͯΔ
     w %FGFSSFE3FTPMWFS
     w 'FUDIFS
     w

     SFTPMWF͢ΔͷΛ஗Βͤͯɺ·ͱΊͯऔಘͰ͖Δ΋ ͷΛ·ͱΊͯऔಘ͢ΔΑ͏ʹ͢Δ
     w pOE#Z*E
     
     /ΛpOE#Z*ETʹ͢Δ͚ͩͳΠϝʔδ
     w Ωϟογϡͨ͠Γ΋Մೳ 124

125. object UserResolver { private implicit lazy val hasId: HasId[User, UserId]

     = HasId(_.id) val userFetcher: Fetcher[GraphQLContext, User, User, UserId] = { Fetcher.apply { (ctx: GraphQLContext, ids: Seq[UserId]) => UserDao.findByIds(ids)(ctx.ec) } } def byId(userId: UserId)( implicit ctx: GraphQLContext): DeferredValue[GraphQLContext, User] = { DeferredValue(userFetcher.defer(userId)) } } / ໰୊ 125

126. object UserResolver { private implicit lazy val hasId: HasId[User, UserId]

     = HasId(_.id) val userFetcher: Fetcher[GraphQLContext, User, User, UserId] = { Fetcher.apply { (ctx: GraphQLContext, ids: Seq[UserId]) => UserDao.findByIds(ids)(ctx.ec) } } def byId(userId: UserId)( implicit ctx: GraphQLContext): DeferredValue[GraphQLContext, User] = { DeferredValue(userFetcher.defer(userId)) } } / ໰୊ 126 4FR<6TFS*E>
     
     4FR<6TFS>ͳॲཧ

127. object UserResolver { private implicit lazy val hasId: HasId[User, UserId]

     = HasId(_.id) val userFetcher: Fetcher[GraphQLContext, User, User, UserId] = { Fetcher.apply { (ctx: GraphQLContext, ids: Seq[UserId]) => UserDao.findByIds(ids)(ctx.ec) } } def byId(userId: UserId)( implicit ctx: GraphQLContext): DeferredValue[GraphQLContext, User] = { DeferredValue(userFetcher.defer(userId)) } } / ໰୊ 127 4FR<6TFS*E>
     
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128. object UserResolver { private implicit lazy val hasId: HasId[User, UserId]

     = HasId(_.id) val userFetcher: Fetcher[GraphQLContext, User, User, UserId] = { Fetcher.apply { (ctx: GraphQLContext, ids: Seq[UserId]) => UserDao.findByIds(ids)(ctx.ec) } } def byId(userId: UserId)( implicit ctx: GraphQLContext): DeferredValue[GraphQLContext, User] = { DeferredValue(userFetcher.defer(userId)) } } / ໰୊ 128 'FUDIFSEFGFSͰ*%Λ౉͢ͱ
     ͍͍ײ͡ʹ/ Λ௵ͯ͘͠ΕΔ

129. / ໰୊ 129 w ؔ࿈Λ୧Δ/ Λղফ͢Δͷ΋༻ҙ͞Ε͍ͯΔ object UserResolver { private

     val usersByProjects: Relation[User, User, ProjectId] = Relation[User, ProjectId]("byProjects", { u: User => u.projectIds }) lazy val userFetcherByProject: Fetcher[GraphQLContext, User, User, UserId] = { Fetcher.relOnly { (ctx: GraphQLContext, rel: RelationIds[User]) => val ids: Seq[ProjectId] = rel.apply(usersByProjects) UserDao.findByProjectIds(ids)(ctx.ec) } } def findByProjectId(projectId: ProjectId)( implicit ctx: GraphQLContext): DeferredValue[GraphQLContext, Seq[User]] = { DeferredValue(userFetcherByProject.deferRelSeq(usersByProjects, projectId)) } }

130. ·ͱΊ 130

131. ·ͱΊ w (SBQI2-ศརͩ͠Φεεϝ
     w ۜͷ஄ؙͰ͸ͳ͍ ೋ౓໨
     w ࣍ͷϓϩδΣΫτͰ΋࠾༻͍ͨ͠
     w

     3&45΍ͬͯͨࠒͱ೰ΉϙΠϯτ͕มΘΔ
     w Ͳ͕ͬͪྑ͍ɺͱ͍͏࿩Ͱ͸ͳ͍
     w 4DBMBͱ΋૬ੑ͸ྑ͍
     w 4BOHSJBΛ࢖͑͹े෼ઓ͑Δ 131

132. ࣮ફͰ͖ͦ͏Ͱ͠ΐ͏͔ʁ 132

133. ࠓ೔ͷΰʔϧ
     ʮ࣍ͷϓϩδΣΫτͰ͸
     ɹ(SBQI2-Λ 4DBMBͰ ΍Γ͍ͨʂʯ 133

134. ࣮ફ(SBQI2-
     PO
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