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循環参照してるEntityのシリアライズとかの話
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Takashi Kanemoto
July 08, 2018
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循環参照してるEntityのシリアライズとかの話
Symfony Meetup #21 LT 資料
https://symfony.connpass.com/event/90319/
Takashi Kanemoto
July 08, 2018
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Transcript
/30 1 ॥ࢀরͯ͠ΔEntityͷ γϦΞϥΠζͱ͔ͷ #symfony_meetup 2018.07.08 @ttskch
ttskchʢ͖ͨͭͪʣ 2 • ໊ݹ͔Βདྷ·ͨ͠ • (ג)ΧϧςοτίϛϡχέʔγϣϯζCTO • PHPྺ6.5ɺSymfonyྺ4ʢROMઐʣ • ͓ख͍ͨ͠ຊʢ2015/12ʣ
/30
͋͞ɺ͋ͳͨࠓ͙͢ϑΥϩʔ͠Α͏!!! શແྉ ͨ ͭ ͖ ͪ twitter.com/ttskch ·͞ʹ໊ݴػ ਓੜͰେͳ͜ͱɺͯ͢ ͖͔ͨͭͪΒڭΘͬͨ
͖ͨͭͪΛϑΥϩʔͨ͠Β ࠊ௧͕࣏Γ·ͨ͠ ͍ͯ͠Δ ͍ͯ͠ͳ͍ ͖ͨͭͪΛϑΥϩʔ͍ͯ͠Δʁ ϑΥϩϫʔ͞Μ100ਓʹฉ͖·ͨ͠ 100% φϯτʂ ϑΥϩϫʔ͔Βͷࢧ࣋ 3/30
• PHPer/JSer ઈࢍେืूதʂʢϑϧϦϞʔτϫʔΫՄʂʣ • ϦεςΟϯάࠂӡ༻πʔϧʮLisketʯΛఏڙ • ࣌ΛઌऔΔϗϫΠτاۀͰ͢ (ג)Χϧςοτίϛϡχέʔγϣϯζ 4 ಛผड
/30
5 (ג)Χϧςοτίϛϡχέʔγϣϯζ ΤϯδχΞͷಇ͖͢͞େࣄʹͯ͠·͢ /30
6 (ג)Χϧςοτίϛϡχέʔγϣϯζ SNSͳͲ͔Β͓ؾܰʹ͝࿈བྷ͍ͩ͘͞✨ /30
/30 7 ॥ࢀরͯ͠ΔEntityͷ γϦΞϥΠζͱ͔ͷ #symfony_meetup 2018.07.08 @ttskch /30
class User { public $name; /** * @var Post[] */
public $posts; } 8 Α͋͘Δ User(1) - Post(N) class Post { public $title; /** * @var User */ public $user; } /30
$serializer = SerializerBuilder::create()->build(); $json = $serializer->serialize($user, 'json'); echo $json; 9
jms/serializerͰUserΛγϦΞϥΠζ /30
{ "name": "user1", "posts": [ { "title": "post1" }, {
"title": "post2" } ] } 10 ݁Ռ posts.user͕ফ͑ڈͬͯΔ /30
class User { public $name; /** * @var Post[] */
public $posts; } 11 user.posts.user = userʢ॥ࢀরʣ class Post { public $title; /** * @var User */ public $user; } /30
ͳΔ΄Ͳ͔֬ʹ 12 • ͩͬͨΒɺMaxDepth(1) ͱ͔͓͚ͬͯ ҆શʹγϦΞϥΠζͰ͖ΔͷͰʁ /30
use JMS\Serializer\Annotation\MaxDepth; class User { public $name; /** * @var
Post[] * * @MaxDepth(1) */ public $posts; } 13 ͬͯΈͨ /30
- $serializer = SerializerBuilder::create()->build(); + $serializer = SerializerBuilder::create() + ->setSerializationContextFactory(function
() { + return SerializationContext::create() + ->enableMaxDepthChecks() + ; + }) + ->build() + ; 14 ͬͯΈͨ MaxDepthͷνΣοΫΛ༗ޮԽ /30
{ "name": "user1", "posts": [ { "title": "post1" }, {
"title": "post2" } ] } 15 ݁Ռ มΘΒͣɻ /30
ΑΖ͍͠, ͳΒ print σόοάͩ 16/30
if ((null === $v && $context->shouldSerializeNull() !== true) || (true
=== $metadata->skipWhenEmpty && ($v instanceof \ArrayObject || \is_array($v)) && 0 === count($v)) ) { return; } 17 JsonSerializationVisitor.php ͜͜Ͱreturnͯͨ͠ʢ͕null͔ͭɺnullγϦΞϥΠζ͠ͳ͍ઃఆʣ /30
$serializer = SerializerBuilder::create() ->setSerializationContextFactory(function () { return SerializationContext::create() ->enableMaxDepthChecks() +
->setSerializeNull(true) ; }) ->build() ; 18 nullγϦΞϥΠζ͢ΔΑ͏ʹઃఆ /30
{ "name": "user1", "posts": [ { "title": "post1", "user": null
}, { "title": "post2", "user": null } ] } 19 ֬ೝ post.user͔֬ʹnullʹͳͬͯΔ /30
͞Βʹ print σόοά 20/30
if ($context->isVisiting($data)) { return null; } 21 GraphNavigator.php ͜͜Ͱnullʹͳͬͯͨ /30
if ($context->isVisiting($data)) { return null; } 22 ࣮ݧɿಉҰΦϒδΣΫτ͡Όͳ͚Ε͍͚Δͷ͔ ϓϩύςΟΛτοϓμϯͰḷΓͭͭɺ๚த ͷΦϒδΣΫτΛελοΫ͓͍ͯͯ͠ɺ৽ͨʹ๚
ͨ͠ΦϒδΣΫτ͕๚தελοΫʹੵ·Ε ͯͨΒ࠶ؼͳͷͰnullʹ͢Δɺͱ͍͏࣮Έ͍ͨ /30
foreach ($user->posts as $post) { $post->user = clone $user; }
$json = $serializer->serialize($user, 'json'); 23 clone $user ͯ͠ஔ͖͑ͯΈΔ /30
{ "name": "user1", "posts": [ { "title": "post1", "user": {
"name": "user1", "posts": [ null, null ] } }, : ] } 24 ݁Ռ ͳΔ΄Ͳߦ͚ͨɻ /30
݁ 25 • jms/serializerͰɺಉҰΦϒδΣΫτ͕࠶ؼ తʹࢀর͞ΕΔΤϯςΟςΟγϦΞϥΠζ Ͱ͖ͳ͍ • MaxDepthͷνΣοΫҎલʹ͔ΕͯΔʢଟʣ /30
͡Ό͋ Ͳ͏͢Εʁ 26/30
APIΛ͚Δ 27 • userͱpostsผʑͷAPI͔Βऔಘ͢Δ • ϑϩϯτͷΠϝʔδ http.get(`/users/${user.id}`) .then(user => http.get(`/users/${user.id}/posts`)
.then(posts => ({user, posts}))) .then(({user, posts}) => { user.posts = posts; this.user = user; }) ; /30
// user-repository.ts get(id: string): Observable<User> { return this.http.get(`/users/${id}`).pipe( map(response =>
getUserFromResponse(response)), switchMap((user: User) => this.postRepository.cgetByUser(user).pipe( map((posts: Post[]) => { user.posts = posts; return user; }) )) ); } 28 Angular (rxjs@6) ͩͱ͜Μͳײ͡ /30
·ͱΊ 29 • jms/serializerͰ॥ࢀর͍ͯ͠ΔΤϯςΟ ςΟγϦΞϥΠζͰ͖ͳ͍ • ͜͏͍͏߹APIΛ͚Δͷ͕Ұൠతʢଟʣ • Qiitaʹࡉ͔͘ॻ͍ͯ·͢ https://bit.ly/2uaINck
/30
Thanks :) 30/30