<\/div>\n

Merhaba,<\/p>\n

Bu i\u00e7eri\u011fimizde Node.js’de Mongoose \u00fczerinden yap\u0131lan NoSQL i\u015flemlerinde \u00fczerinde \u00e7al\u0131\u015f\u0131lan verinin s\u0131n\u0131rl\u0131l\u0131klar\u0131n\u0131 belirleyebilmemizi sa\u011flayan Type, Default, Required ve Unique keywordlerini inceliyor olaca\u011f\u0131z. \u015eimdi hi\u00e7 vakit kaybetmeden bu keywordleri s\u0131ras\u0131yla tek tek ele alal\u0131m.<\/p>\n

\nType<\/strong>
\nVerideki herhangi bir alan\u0131n veri t\u00fcr\u00fcn\u00fc belirlemek i\u00e7in kullan\u0131lmaktad\u0131r.<\/p>\n
\r\nconst model = new mongoose.Schem a({\r\n property: {\r\n type: String\r\n }\r\n});\r\n<\/pre>\n<\/li>\n
\nDefault<\/strong>
\nVerinin varsay\u0131lan de\u011ferini belirtmek i\u00e7in kullan\u0131lmaktad\u0131r.<\/p>\n
\r\nconst model = new mongoose.Schem a({\r\n property: {\r\n type: String,\r\n default: "varsay\u0131lan de\u011fer"\r\n }\r\n});\r\n<\/pre>\n
Default keyword\u00fc kullan\u0131lan alanlara model \u00fczerinden herhangi bir de\u011fer atamas\u0131 ger\u00e7ekle\u015ftirilmese dahi ilgili alan varsay\u0131lan de\u011feriyle veritaban\u0131na kaydedilecektir.<\/p>\n
\r\n const instance = new Employee({ });\r\n instance.save((error, data) => { });\r\n<\/pre>\n
\u015feklinde model nesnesi \u00fczerinden ilgili alana de\u011fer atamaks\u0131z\u0131n veritaban\u0131na kayda g\u00f6nderirsek e\u011fer;
\n $\"Node.js$ <\/a>
\nilgili alan varsay\u0131lan de\u011feriyle g\u00f6r\u00fcld\u00fc\u011f\u00fc gibi bas\u0131lacakt\u0131r…\n<\/li>\n
\nRequired<\/strong>
\nRequired keyword\u00fc kullan\u0131ld\u0131\u011f\u0131 alan\u0131n bo\u015f ge\u00e7ilmesine izin vermemektedir.<\/p>\n
\r\nconst model = new mongoose.Schem a({\r\n property: {\r\n type: String,\r\n required: true\r\n }\r\n});\r\n<\/pre>\n
E\u011fer veriyi ilgili alana bir de\u011fer atama yapmaks\u0131z\u0131n veritaban\u0131na g\u00f6nderirsek a\u015fa\u011f\u0131daki gibi required engelleyecektir.<\/p>\n
\r\n const instance = new Employee({ });\r\n\r\n instance.save((error, data) => {\r\n if (error)\r\n console.log("Beklenmeyen bir hatayla kar\u015f\u0131la\u015f\u0131ld\u0131...", error.message);\r\n response.json(data);\r\n });\r\n<\/pre>\n
$\"Node.js$ <\/a>
\nBu durumda default keyword\u00fc ile varsay\u0131lan de\u011fer atay\u0131p bu hatadan kurtulabiliriz.<\/p>\n
\r\nconst model = new mongoose.Schem a({\r\n property: {\r\n type: String,\r\n required: true,\r\n default: "value"\r\n }\r\n});\r\n<\/pre>\n
\u0130\u015fte bu \u015fekilde ilgili alana de\u011fer atanmad\u0131\u011f\u0131 taktirde default keyword\u00fcndeki de\u011fer varsay\u0131lan olarak atanaca\u011f\u0131ndan dolay\u0131 required devreye girmeyecektir.\n<\/li>\n
\nUnique<\/strong>
\nVerileri ekleyece\u011fimiz collectionda ayn\u0131 id de\u011ferinde birden fazla verinin olmas\u0131 durumunu engellemektedir. Yani verileri tekille\u015ftirmektedir. <\/p>\n
\r\nconst model = new mongoose.Schem a({\r\n _id: Number,\r\n property: {\r\n type: String,\r\n unique: true\r\n }\r\n});\r\n<\/pre>\n<\/li>\n<\/ul>\n
\u0130lgilenenlerin faydalanmas\u0131 dile\u011fiyle…<\/p>\n
Sonraki yaz\u0131lar\u0131mda g\u00f6r\u00fc\u015fmek \u00fczere…
\n\u0130yi \u00e7al\u0131\u015fmalar…<\/p>\n","protected":false},"excerpt":{"rendered":"
Merhaba, Bu i\u00e7eri\u011fimizde Node.js’de Mongoose \u00fczerinden yap\u0131lan NoSQL i\u015flemlerinde \u00fczerinde \u00e7al\u0131\u015f\u0131lan verinin s\u0131n\u0131rl\u0131l\u0131klar\u0131n\u0131 belirleyebilmemizi sa\u011flayan Type, Default, Required ve Unique keywordlerini inceliyor olaca\u011f\u0131z. \u015eimdi hi\u00e7 vakit kaybetmeden bu keywordleri s\u0131ras\u0131yla tek tek ele alal\u0131m....<\/p>\n","protected":false},"author":1,"featured_media":8971,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2539,2145,2538],"tags":[2548,2549,2547,2550,2544,2545,2543,2546],"class_list":["post-9014","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mongodb","category-node-js","category-nosql","tag-mongoose-default","tag-mongoose-required","tag-mongoose-type","tag-mongoose-unique","tag-node-js-default","tag-node-js-required","tag-node-js-type","tag-node-js-unique"],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/posts\/9014","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/comments?post=9014"}],"version-history":[{"count":12,"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/posts\/9014\/revisions"}],"predecessor-version":[{"id":9028,"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/posts\/9014\/revisions\/9028"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/media\/8971"}],"wp:attachment":[{"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/media?parent=9014"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/categories?post=9014"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/tags?post=9014"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}