Slide 1
Slide 1 text
(SBQI2-#FUUFS&SSPST
(SBQI2-0TBLB
Slide 2
Slide 2 text
w (SBQI2-ͷΤϥʔͷϨεϙϯεͷϑΥʔϚοτܾ·ͬ
͍ͯ·͢ɻ
w ͦͷ(SBQI2-ͷΤϥʔͷ༷Τϥʔ͕ൃੜͨ͠ͱ͖
ͷϋϯυϦϯάΛ"QPMMP(SBQI2-(SBQI2-3VCZ
ͳͲͷ࣮ྫͰհ͠·͢ɻ
Slide 3
Slide 3 text
(SBQI2-4QFD
IUUQTHSBQIRMHJUIVCJPHSBQIRMTQFD
Slide 4
Slide 4 text
Prerelease Working Draft Sat, Oct 5, 2019
Latest Release June 2018 Sun, Jun 10, 2018 Release Notes
October 2016 Mon, Oct 31, 2016 Release Notes
April 2016 Thu, Apr 7, 2016 Release Notes
October 2015 Thu, Oct 1, 2015 Release Notes
July 2015 Thu, Jul 2, 2015 Release Notes
GraphQL
Slide 5
Slide 5 text
3FTQPOTF'PSNBU
{
"data": { ... },
"errors": [ ... ]
}
Slide 6
Slide 6 text
3FTQPOTF&SSPST
Example No 189
{
"errors": [
{
"message": "Name for character with ID 1002 could not be fetched.",
"locations": [ { "line": 6, "column": 7 } ],
"path": [ "hero", "heroFriends", 1, "name" ],
"extensions": {
"code": "CAN_NOT_FETCH_BY_ID",
"timestamp": "Fri Feb 9 14:33:09 UTC 2018"
}
}
]
}
Slide 7
Slide 7 text
"QPMMP4FSWFS
IUUQTXXXBQPMMPHSBQIRMDPNEPDTBQPMMPTFSWFSEBUB
Slide 8
Slide 8 text
&SSPS)BOEMJOH
IUUQTXXXBQPMMPHSBQIRMDPNEPDTBQPMMPTFSWFSEBUBFSSPST
"QPMMP4FSWFSQSPWJEFTBDPMMFDUJPOPG
QSFEFpOFEFSSPST
JODMVEJOH
"VUIFOUJDBUJPO&SSPS
'PSCJEEFO&SSPS
6TFS*OQVU&SSPS
BOEBHFOFSJD
"QPMMP&SSPS
Slide 9
Slide 9 text
"VUIFOUJDBUJPO&SSPS
const { ApolloServer, gql, AuthenticationError } = require("apollo-server");
const typeDefs = gql`
type Query {
authenticationError: String
}
`;
const resolvers = {
Query: {
authenticationError: (parent, args, context) => {
throw new AuthenticationError("must authenticate");
}
}
};
Slide 10
Slide 10 text
\
FSSPST<
\
NFTTBHFNVTUBVUIFOUJDBUF
MPDBUJPOT<
\
MJOF
DPMVNO
^
>
QBUI<
BVUIFOUJDBUJPO&SSPS
>
FYUFOTJPOT\
DPEF6/"65)&/5*$"5&%
^
^
>
EBUB\
BVUIFOUJDBUJPO&SSPSOVMM
^
^
Slide 11
Slide 11 text
"QPMMP$MJFOU
IUUQTXXXBQPMMPHSBQIRMDPNEPDTSFBDU
Slide 12
Slide 12 text
&SSPS)BOEMJOH
IUUQTXXXBQPMMPHSBQIRMDPNEPDTSFBDUEBUBFSSPSIBOEMJOH
• graphQLErrors: An array of errors from
the GraphQL endpoint
Slide 13
Slide 13 text
HSBQI2-&SSPST
import { ApolloProvider, useQuery } from “@apollo/react-hooks";
function Element() {
const { loading, error, data } = useQuery(gql`
{
authenticationError
}
`);
if (loading) return
Loading...
; if (error) { return error.graphQLErrors.map(({ message, extensions }, i) => ({message}: {extensions.code}
))
}
}
Slide 14
Slide 14 text
NVTUBVUIFOUJDBUF6/"65)&/5*$"5&%
Slide 15
Slide 15 text
(SBQI2-3VCZ
IUUQTHSBQIRMSVCZPSHFSSPSTPWFSWJFX
Slide 16
Slide 16 text
&SSPS)BOEMJOH
IUUQTHSBQIRMSVCZPSHFSSPSTFSSPS@IBOEMJOH
w 4FQU
/FX'FBUVSFT
w VTF(SBQI2-&YFDVUJPO&SSPSTQSPWJEFTFSSPS
IBOEMJOHGPSUIFOFXJOUFSQSFUFS
Slide 17
Slide 17 text
(SBQI2-&YFDVUJPO&SSPS
class MySchema < GraphQL::Schema
use GraphQL::Execution::Interpreter
use GraphQL::Analysis::AST
use GraphQL::Execution::Errors
rescue_from(ActiveRecord::RecordNotFound) do |err, obj, args, ctx, field|
GraphQL::ExecutionError.new(
err.message,
extensions: {code: ‘RecordNotFound'}
)
end
end
Slide 18
Slide 18 text
{
"data": null,
"errors": [
{
"message": "Couldn't find User",
"locations": [
{
"line": 2,
"column": 3
}
],
"path": [
"user"
],
"extensions": {
"code": "RecordNotFound"
}
}
]
}
Slide 19
Slide 19 text
$VTUPN4DBMBST
IUUQTHSBQIRMSVCZPSHUZQF@EFpOJUJPOTTDBMBST
w "VH
/FXGFBUVSFT
w "EEFYUFOTJPOTJO$PFSDJPO&SSPS
Slide 20
Slide 20 text
(SBQI2-$PFSDJPO&SSPS
module Types
class EmailAddress < Types::BaseScalar
def self.coerce_input(value, _context)
unless URI::MailTo::EMAIL_REGEXP.match(value)
raise GraphQL::CoercionError.new(
"#{value} is not a valid email address",
extensions: { code: “Invalid_Email" }
)
end
value
end
end
end
Slide 21
Slide 21 text
{
"errors": [
{
"message": "example.com is not a valid email address",
"locations": [
{
"line": 2,
"column": 3
}
],
"path": [
"query",
"user",
"email"
],
"extensions": {
"code": "Invalid_Email",
"typeName": "CoercionError"
}
}
]
}
Slide 22
Slide 22 text
(SBQI2-0TBLB