/30 1 ॥؀ࢀরͯ͠ΔEntityͷ γϦΞϥΠζͱ͔ͷ࿩ #symfony_meetup 2018.07.08 @ttskch 

ttskchʢ͖ͨͭͪʣ 2 • ໊ݹ԰͔Βདྷ·ͨ͠ • (ג)ΧϧςοτίϛϡχέʔγϣϯζCTO • PHPྺ6.5೥ɺSymfonyྺ4೥ʢROMઐʣ • ͓ख఻͍ͨ͠ຊʢ2015/12ʣ /30 

͋͞ɺ͋ͳͨ΋ࠓ͙͢ϑΥϩʔ͠Α͏!!! ׬શແྉ ͨ ͭ ͖ ͪ twitter.com/ttskch ·͞ʹ໊ݴ੡଄ػ ਓੜͰେ੾ͳ͜ͱ͸ɺ͢΂ͯ ͖͔ͨͭͪΒڭΘͬͨ ͖ͨͭͪΛϑΥϩʔͨ͠Β
 ࠊ௧͕࣏Γ·ͨ͠  ͍ͯ͠Δ ͍ͯ͠ͳ͍ ͖ͨͭͪΛϑΥϩʔ͍ͯ͠Δʁ ϑΥϩϫʔ͞Μ100ਓʹฉ͖·ͨ͠ 100% φϯτʂ ϑΥϩϫʔ͔Βͷࢧ࣋཰ 3/30 

• PHPer/JSer ઈࢍେืूதʂʢϑϧϦϞʔτϫʔΫՄʂʣ • ϦεςΟϯά޿ࠂӡ༻πʔϧʮLisketʯΛఏڙ • ࣌୅ΛઌऔΔϗϫΠτاۀͰ͢ (ג)Χϧςοτίϛϡχέʔγϣϯζ 4 ಛผ৆ड৆ /30 

5 (ג)Χϧςοτίϛϡχέʔγϣϯζ ΤϯδχΞͷಇ͖΍͢͞௒େࣄʹͯ͠·͢ /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) ͱ͔΍͓͚ͬͯ͹
 ҆શʹγϦΞϥΠζͰ͖ΔͷͰ͸ʁ /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 ͜͜Ͱreturnͯͨ͠ʢ஋͕null͔ͭɺnull͸γϦΞϥΠζ͠ͳ͍ઃఆʣ /30 

$serializer = SerializerBuilder::create() ->setSerializationContextFactory(function () { return SerializationContext::create() ->enableMaxDepthChecks() + ->setSerializeNull(true) ; }) ->build() ; 18 null΋γϦΞϥΠζ͢ΔΑ͏ʹઃఆ /30 

{ "name": "user1", "posts": [ { "title": "post1", "user": null }, { "title": "post2", "user": null } ] } 19 ֬ೝ post.user͸͔֬ʹnullʹͳͬͯΔ /30 

͞Βʹ print σόοά 20/30 

if ($context->isVisiting($data)) { return null; } 21 GraphNavigator.php ͜͜Ͱnullʹͳͬͯͨ /30 

if ($context->isVisiting($data)) { return null; } 22 ࣮ݧɿಉҰΦϒδΣΫτ͡Όͳ͚Ε͹͍͚Δͷ͔ ϓϩύςΟΛτοϓμ΢ϯͰḷΓͭͭɺ๚໰த ͷΦϒδΣΫτΛελοΫ͓͍ͯͯ͠ɺ৽ͨʹ๚ ໰ͨ͠ΦϒδΣΫτ͕๚໰தελοΫʹੵ·Ε ͯͨΒ࠶ؼͳͷͰnullʹ͢Δɺͱ͍͏࣮૷Έ͍ͨ /30 

foreach ($user->posts as $post) { $post->user = clone $user; } $json = $serializer->serialize($user, 'json'); 23 clone $user ͯ͠ஔ͖׵͑ͯΈΔ /30 

{ "name": "user1", "posts": [ { "title": "post1", "user": { "name": "user1", "posts": [ null, null ] } }, : ] } 24 ݁Ռ ͳΔ΄Ͳߦ͚ͨɻ /30 

݁࿦ 25 • jms/serializerͰ͸ɺಉҰΦϒδΣΫτ͕࠶ؼ తʹࢀর͞ΕΔΤϯςΟςΟ͸γϦΞϥΠζ Ͱ͖ͳ͍ • MaxDepthͷνΣοΫҎલʹ஄͔ΕͯΔʢଟ෼ʣ /30 

͡Ό͋ Ͳ͏͢Ε͹ʁ 26/30 

APIΛ෼͚Δ 27 • userͱposts͸ผʑͷAPI͔Βऔಘ͢Δ • 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 { 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 ςΟ͸γϦΞϥΠζͰ͖ͳ͍ • ͜͏͍͏৔߹͸APIΛ෼͚Δͷ͕Ұൠతʢଟ෼ʣ • Qiitaʹࡉ͔͘ॻ͍ͯ·͢
 https://bit.ly/2uaINck /30 

Thanks :) 30/30