{"id":2387,"date":"2023-07-22T11:54:42","date_gmt":"2023-07-22T11:54:42","guid":{"rendered":"https:\/\/statorials.org\/pl\/mongodb-zawiera\/"},"modified":"2023-07-22T11:54:42","modified_gmt":"2023-07-22T11:54:42","slug":"mongodb-zawiera","status":"publish","type":"post","link":"https:\/\/statorials.org\/pl\/mongodb-zawiera\/","title":{"rendered":"Mongodb: jak sprawdzi\u0107, czy pole zawiera ci\u0105g znak\u00f3w"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Mo\u017cesz u\u017cy\u0107 nast\u0119puj\u0105cej sk\u0142adni w MongoDB, aby sprawdzi\u0107, czy okre\u015blone pole zawiera okre\u015blony ci\u0105g znak\u00f3w:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>db.collection.findOne({ <span style=\"color: #ff0000;\">name<\/span> : { <span style=\"color: #ff0000;\">$regex<\/span> : <span style=\"color: #3366ff;\">\/string\/<\/span> }})<\/strong>\n<\/pre>\n<p> <span style=\"color: #000000;\">Poni\u017csze przyk\u0142ady pokazuj\u0105, jak u\u017cywa\u0107 tej sk\u0142adni w przypadku <span style=\"padding: 1px; border: 1px solid black;\">zespo\u0142u<\/span> windykacyjnego z nast\u0119puj\u0105cymi dokumentami:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>db.teams.insertOne({team: \" <span style=\"color: #008000;\">Mavs<\/span> \", position: \" <span style=\"color: #008000;\">Guard<\/span> \", points: <span style=\"color: #ff0000;\">31<\/span> })<\/strong>\n<strong>db.teams.insertOne({team: \" <span style=\"color: #008000;\">Spurs<\/span> \", position: \" <span style=\"color: #008000;\">Guard<\/span> \", points: <span style=\"color: #ff0000;\">22<\/span> })<\/strong>\n<strong>db.teams.insertOne({team: \" <span style=\"color: #008000;\">Rockets<\/span> \", position: \" <span style=\"color: #008000;\">Center<\/span> \", points: <span style=\"color: #ff0000;\">19<\/span> })<\/strong>\n<strong>db.teams.insertOne({team: \" <span style=\"color: #008000;\">Warriors<\/span> \", position: \" <span style=\"color: #008000;\">Forward<\/span> \", points: <span style=\"color: #ff0000;\">26<\/span> })<\/strong>\n<strong>db.teams.insertOne({team: \" <span style=\"color: #008000;\">Cavs<\/span> \", position: \" <span style=\"color: #008000;\">Guard<\/span> \", points: <span style=\"color: #ff0000;\">33<\/span> })<\/strong><\/pre>\n<h3> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 1: Sprawd\u017a, czy pole zawiera ci\u0105g znak\u00f3w<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Mo\u017cemy u\u017cy\u0107 poni\u017cszego kodu, aby sprawdzi\u0107, czy w polu zespo\u0142u znajduje si\u0119 dokument zawieraj\u0105cy ci\u0105g \u201eavs\u201d:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>db.teams.findOne({ <span style=\"color: #ff0000;\">team<\/span> : { <span style=\"color: #ff0000;\">$regex<\/span> : <span style=\"color: #3366ff;\">\/avs\/<\/span> }}) \n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">To zapytanie zwraca nast\u0119puj\u0105cy dokument:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>{ _id: ObjectId(\"618050098ffcfe76d07b1da5\"),\n  team: 'Mavs',\n  position: 'Guard',\n  points: 31 }\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Nale\u017cy pami\u0119ta\u0107, \u017ce funkcja <a href=\"https:\/\/docs.mongodb.com\/upcoming\/reference\/method\/db.collection.findOne\/\" target=\"_blank\" rel=\"noopener\">findOne()<\/a> zwraca pierwszy dokument w kolekcji, kt\u00f3ry spe\u0142nia kryteria zapytania.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Oznacza to, \u017ce inne zespo\u0142y r\u00f3wnie\u017c mog\u0105 mie\u0107 ci\u0105g \u201eavs\u201d w nazwie swojego zespo\u0142u, ale dokument zawieraj\u0105cy nazw\u0119 zespo\u0142u \u201eMavs\u201d by\u0142 po prostu pierwszym.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 2: Sprawd\u017a, czy pole zawiera ci\u0105g znak\u00f3w (wielko\u015b\u0107 liter nie ma znaczenia)<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Mo\u017cemy tak\u017ce u\u017cy\u0107 <span style=\"padding: 1px; border: 1px solid black;\">i<\/span> po ci\u0105gu znak\u00f3w, aby dopasowa\u0107 <strong>bez uwzgl\u0119dniania wielko\u015bci liter<\/strong> .<\/span><\/p>\n<p> <span style=\"color: #000000;\">Za\u0142\u00f3\u017cmy na przyk\u0142ad, \u017ce u\u017cywamy nast\u0119puj\u0105cego zapytania:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>db.teams.findOne({ <span style=\"color: #ff0000;\">team<\/span> : { <span style=\"color: #ff0000;\">$regex<\/span> : <span style=\"color: #3366ff;\">\/AVS\/i<\/span> }}) \n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">To zapytanie zwraca r\u00f3wnie\u017c nast\u0119puj\u0105cy dokument:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>{ _id: ObjectId(\"618050098ffcfe76d07b1da5\"),\n  team: 'Mavs',\n  position: 'Guard',\n  points: 31 }\n<\/strong><\/pre>\n<h3> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 3: Sprawd\u017a, czy pole zawiera ci\u0105g znak\u00f3w (brak wynik\u00f3w)<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Je\u015bli pole nie zawiera konkretnego ci\u0105gu, kt\u00f3rego szukamy, po prostu otrzymamy odpowiednio warto\u015b\u0107 <strong>null<\/strong> .<\/span><\/p>\n<p> <span style=\"color: #000000;\">Za\u0142\u00f3\u017cmy na przyk\u0142ad, \u017ce u\u017cywamy nast\u0119puj\u0105cego zapytania:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>db.teams.findOne({ <span style=\"color: #ff0000;\">team<\/span> : { <span style=\"color: #ff0000;\">$regex<\/span> : <span style=\"color: #3366ff;\">\/ricks\/<\/span> }})<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">To zapytanie zwraca nast\u0119puj\u0105cy wynik:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>null<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Poniewa\u017c \u017caden dokument nie zawiera ci\u0105gu \u201ericks\u201d w nazwie zespo\u0142u, w rezultacie otrzymamy <strong>warto\u015b\u0107 null<\/strong> .<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Uwaga<\/strong> : Pe\u0142n\u0105 dokumentacj\u0119 <strong>$regex<\/strong> znajdziesz <a href=\"https:\/\/docs.mongodb.com\/manual\/reference\/operator\/query\/regex\/\" target=\"_blank\" rel=\"noopener\">tutaj<\/a> .<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Dodatkowe zasoby<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Poni\u017csze samouczki wyja\u015bniaj\u0105, jak wykonywa\u0107 inne typowe operacje w MongoDB:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/pl\/mongodb-nie-jest-pusty\/\" target=\"_blank\" rel=\"noopener\">MongoDB: Jak wyszuka\u0107 \u201enie null\u201d w okre\u015blonym polu<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/zapytanie-podobne-do-mongodb\/\" target=\"_blank\" rel=\"noopener\">MongoDB: Jak wysy\u0142a\u0107 zapytania za pomoc\u0105 wyra\u017cenia regularnego \u201eLubi\u0119 to\u201d<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/pole-dodawania-mongodb\/\" target=\"_blank\" rel=\"noopener\">MongoDB: Jak doda\u0107 nowe pole do kolekcji<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/pole-usuwania-mongodb\/\" target=\"_blank\" rel=\"noopener\">MongoDB: Jak usun\u0105\u0107 pole z ka\u017cdego dokumentu<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Mo\u017cesz u\u017cy\u0107 nast\u0119puj\u0105cej sk\u0142adni w MongoDB, aby sprawdzi\u0107, czy okre\u015blone pole zawiera okre\u015blony ci\u0105g znak\u00f3w: db.collection.findOne({ name : { $regex : \/string\/ }}) Poni\u017csze przyk\u0142ady pokazuj\u0105, jak u\u017cywa\u0107 tej sk\u0142adni w przypadku zespo\u0142u windykacyjnego z nast\u0119puj\u0105cymi dokumentami: db.teams.insertOne({team: &#8221; Mavs &#8222;, position: &#8221; Guard &#8222;, points: 31 }) db.teams.insertOne({team: &#8221; Spurs &#8222;, position: &#8221; Guard [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-2387","post","type-post","status-publish","format-standard","hentry","category-przewodnik"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>MongoDB: Jak sprawdzi\u0107, czy pole zawiera ci\u0105g znak\u00f3w - Statologia<\/title>\n<meta name=\"description\" content=\"W tym samouczku wyja\u015bniono, jak sprawdzi\u0107, czy pole zawiera ci\u0105g znak\u00f3w w MongoDB, podaj\u0105c kilka przyk\u0142ad\u00f3w.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/statorials.org\/pl\/mongodb-zawiera\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"MongoDB: Jak sprawdzi\u0107, czy pole zawiera ci\u0105g znak\u00f3w - Statologia\" \/>\n<meta property=\"og:description\" content=\"W tym samouczku wyja\u015bniono, jak sprawdzi\u0107, czy pole zawiera ci\u0105g znak\u00f3w w MongoDB, podaj\u0105c kilka przyk\u0142ad\u00f3w.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pl\/mongodb-zawiera\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-22T11:54:42+00:00\" \/>\n<meta name=\"author\" content=\"Benjamin Anderson\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Napisane przez\" \/>\n\t<meta name=\"twitter:data1\" content=\"Benjamin Anderson\" \/>\n\t<meta name=\"twitter:label2\" content=\"Szacowany czas czytania\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minuty\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/pl\/mongodb-zawiera\/\",\"url\":\"https:\/\/statorials.org\/pl\/mongodb-zawiera\/\",\"name\":\"MongoDB: Jak sprawdzi\u0107, czy pole zawiera ci\u0105g znak\u00f3w - Statologia\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pl\/#website\"},\"datePublished\":\"2023-07-22T11:54:42+00:00\",\"dateModified\":\"2023-07-22T11:54:42+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/6484727a4612df3e69f016c3129c6965\"},\"description\":\"W tym samouczku wyja\u015bniono, jak sprawdzi\u0107, czy pole zawiera ci\u0105g znak\u00f3w w MongoDB, podaj\u0105c kilka przyk\u0142ad\u00f3w.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pl\/mongodb-zawiera\/#breadcrumb\"},\"inLanguage\":\"pl-PL\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pl\/mongodb-zawiera\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pl\/mongodb-zawiera\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Dom\",\"item\":\"https:\/\/statorials.org\/pl\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Mongodb: jak sprawdzi\u0107, czy pole zawiera ci\u0105g znak\u00f3w\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/statorials.org\/pl\/#website\",\"url\":\"https:\/\/statorials.org\/pl\/\",\"name\":\"Statorials\",\"description\":\"Tw\u00f3j przewodnik po kompetencjach statystycznych!\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/statorials.org\/pl\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"pl-PL\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/6484727a4612df3e69f016c3129c6965\",\"name\":\"Benjamin Anderson\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"pl-PL\",\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/statorials.org\/pl\/wp-content\/uploads\/2023\/11\/Benjamin-Anderson-96x96.jpg\",\"contentUrl\":\"https:\/\/statorials.org\/pl\/wp-content\/uploads\/2023\/11\/Benjamin-Anderson-96x96.jpg\",\"caption\":\"Benjamin Anderson\"},\"description\":\"Cze\u015b\u0107, jestem Benjamin i jestem emerytowanym profesorem statystyki, kt\u00f3ry zosta\u0142 oddanym nauczycielem Statorials. 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