{"id":6442,"date":"2017-11-12T17:50:15","date_gmt":"2017-11-12T15:50:15","guid":{"rendered":"https:\/\/www.tomislavstankovic.com\/blog\/?p=6442"},"modified":"2019-01-05T19:52:17","modified_gmt":"2019-01-05T17:52:17","slug":"angular-crud-aplikacija","status":"publish","type":"post","link":"https:\/\/www.tomislavstankovic.com\/blog\/angular-crud-aplikacija\/","title":{"rendered":"Angular CRUD aplikacija"},"content":{"rendered":"

U ovom \u0107u blog postu napraviti jednostavnu Angular<\/em> CRUD (create, read, update, delete)<\/em><\/a> aplikaciju koja \u0107e se sastojati od forme za pregled podataka uz mogu\u0107nost dodavanja, ure\u0111ivanja i brisanja podataka.<\/p>\n

CRUD<\/em> operacije ne\u0161to su s \u010dime se svaki web developer<\/a><\/em> naj\u010de\u0161\u0107e susre\u0107e i zato bi ovaj primjer posebno mogao biti koristan novim developerima<\/em> ili onima koji \u0107e to tek postati. <\/p>\n

Uvod<\/h2>\n

Cilj ovog blog posta je pokazati:
\n – kako kreirati Angular<\/em> projekt koriste\u0107i Angular CLI<\/a><\/em>
\n – kako kreirati i koristiti servis pomo\u0107u kojega \u0107u pozivati JSON API<\/a><\/em>
\n – kako dodati Bootstrap<\/em> za br\u017ee kreiranje forme za unos, pregled, ure\u0111ivanje i brisanje sadr\u017eaja<\/p>\n

Kreiranje Angular projekta<\/h2>\n

Pomo\u0107u Angular CLI-a<\/em><\/a> kreirat \u0107u novi projekt. <\/p>\n

$ ng new AngularCRUD\r\n$ ng serve<\/pre>\n
Ako projekt sada otvorim u web pregledniku na adresi http:\/\/localhost:4200\/<\/a> dobit \u0107u sljede\u0107e <\/p>\n
\"Angular<\/a><\/p>\n
S obzirom da umjesto toga \u017eelim imati formu za unos, pregled, ure\u0111ivanje i brisanje sadr\u017eaja prvo \u0107u dodati podr\u0161ku za Bootstrap<\/em> na na\u010din da u index.html<\/strong> dodam  <\/p>\n
<link href=\"https:\/\/maxcdn.bootstrapcdn.com\/bootstrap\/3.3.7\/css\/bootstrap.min.css\" rel=\"stylesheet\"><\/pre>\n
. I sada mogu koristiti Bootstrap<\/em> komponente<\/a>. <\/p>\n
Kasnije \u0107u se vratiti na izgled forme, a sada idem postaviti glavni dio funkcionalnosti koji se ti\u010de kreiranja servisa i pozivanja API-ja<\/em>.<\/p>\n
Kreiranje servisa za API<\/em><\/h2>\n
Servis pomo\u0107u kojega \u0107u vr\u0161iti sve upite na API<\/em> kreiram naredbom<\/a><\/p>\n
$ ng generate service KorisniciAPI<\/pre>\n
Nakon \u010dega dobijem korisnici-api.service.ts<\/strong><\/p>\n
import { Injectable } from '@angular\/core';\r\n\r\n@Injectable()\r\nexport class KorisniciApiService {\r\n\r\n  constructor() { }\r\n\r\n}<\/pre>\n
Servis se mo\u017ee koristiti za razli\u010dite svrhe, ali kako \u0107u meni ovdje glavna svrha biti slanje upita na API<\/em> zna\u010di da obavezno moram koristiti Http<\/em> servis<\/a>.<\/p>\n
Kona\u010dan izgled servisa mo\u017ee se vidjeti u nastavku, a njime je pokriveno sve – od pregleda svih korisnika, dodavanja novih, ure\u0111ivanja i brisanja postoje\u0107ih.<\/p>\n
import { Injectable } from '@angular\/core';\r\nimport { Http } from '@angular\/http';\r\nimport 'rxjs\/add\/operator\/map';\r\n\r\n@Injectable()\r\nexport class KorisniciApiService {\r\n\r\n  constructor(private _http: Http) {}\r\n\r\n  \/\/ Pregled svih korisnika u imeniku\r\n  svi(){\r\n\t\treturn this._http.get('http:\/\/localhost:3000\/Imenik')\r\n\t\t\t\t   .map(res => res.json());\r\n  } \r\n\r\n  \/\/ Dodavanje korisnika u imenik\r\n  dodaj(a:any){\r\n\t\treturn this._http.post('http:\/\/localhost:3000\/Imenik', a)\r\n\t\t\t\t   .map(res => res.json());\r\n  } \r\n\r\n  \/\/ Ure\u0111ivanje korisnika u imeniku\r\n  uredi(a:any){\r\n    return this._http.put('http:\/\/localhost:3000\/Imenik\/' + a.id, a)\r\n                .map(res => res.json());  \r\n   } \r\n\r\n  \/\/ Brisanje korisnika iz imenika\r\n  obrisi(a:any){\r\n\t\treturn this._http.delete('http:\/\/localhost:3000\/Imenik\/' + a)\r\n\t\t\t\t\t.map(res => res.json());\r\n  }\r\n\r\n}<\/pre>\n
Izgled forme (app.component.html)<\/h2>\n
Za izgled forme iskoristit \u0107u Bootstrap<\/em> komponente. Struktura forme nalazi se unutar app.component.html<\/strong>, a izgleda ovako:<\/p>\n
<div class=\"container-fluid\">\r\n  <div class=\"row\">\r\n      <div class=\"col-lg-8\">\r\n        <div class=\"panel panel-default\">\r\n          <div class=\"panel-heading\">Dodaj\/Uredi korisnika:<\/div>\r\n          <div class=\"panel-body\">\r\n            <form name=\"ImenikForma\" novalidate>\r\n                <div class=\"form-group\">\r\n                    <div class=\"row\">\r\n                      <div class=\"col col-lg-5 col-md-5\" ng-class=\"{ 'has-error' : ImenikForma.ime.$invalid && !ImenikForma.ime.$pristine }\">\r\n                          <div id=\"input_container\">\r\n                            <input type=\"text\" class=\"form-control\" id=\"ime\" required maxlength=\"30\" placeholder=\"Ime i prezime\" [(ngModel)]=\"korisnik.ime\" [ngModelOptions]=\"{standalone: true}\" #ime=\"ngModel\">\r\n                          <\/div>\r\n                        <\/div>\r\n                        <div class=\"col col-lg-5 col-md-5\" ng-class=\"{ 'has-error' : ImenikForma.telefon.$invalid && !ImenikForma.telefon.$pristine }\">\r\n                            <div id=\"input_container\">\r\n                              <input type=\"tel\" class=\"form-control\" id=\"telefon\" required placeholder=\"Telefon\" [(ngModel)]=\"korisnik.telefon\" [ngModelOptions]=\"{standalone: true}\" #telefon=\"ngModel\">\r\n                            <\/div>\r\n                          <\/div>\r\n                          <div class=\"col col-lg-2 col-md-2\">\r\n                              <div id=\"input_container\">\r\n                              <div *ngIf=\"spremi\" class=\"text-center\"><button type=\"button\" class=\"btn btn-success btn-md\" (click)=\"dodajKorisnika(korisnik)\" [disabled]=\"!ime.valid || !telefon.valid\"> Spremi <\/button><\/div> \r\n                              <div *ngIf=\"!spremi\" class=\"text-center\"><button type=\"button\" class=\"btn btn-success btn-md\" (click)=\"urediKorisnika2(korisnik)\" [disabled]=\"!ime.valid || !telefon.valid\"> Uredi <\/button><\/div>\r\n                            <\/div>\r\n                          <\/div>\r\n                        <\/div>\r\n                  <\/div>\r\n            <\/form>\r\n          <\/div>\r\n        <\/div>\r\n      <\/div>\r\n    <\/div>\r\n    \r\n      <div class=\"row\">\r\n        <div class=\"col-lg-8\">\r\n          <div class=\"panel panel-default\">\r\n            <div class=\"panel-heading\">Ukupno korisnika: {{ukupanbrojkorisnika}}<\/div>\r\n            <div class=\"panel-body\">\r\n              <form novalidate>\r\n                <div >\r\n                  <span *ngIf=\"ukupanbrojkorisnika < 1\">Nema podataka<\/span>\r\n                  <table *ngIf=\"ukupanbrojkorisnika > 0\" class=\"table table-striped table-hover table-responsive\" ng-switch-default>\r\n                    <thead>\r\n                      <tr>\r\n                        <th class=\"tablica text-center\">Rb.<\/th>\r\n                        <th class=\"tablica text-center\">Ime<\/th>\r\n                        <th class=\"tablica text-center\">Telefon<\/th>\r\n                        <th class=\"tablica text-center\">Uredi | Obri\u0161i<\/th>\r\n                      <\/tr>\r\n                    <\/thead>\r\n                    <tbody>\r\n                      <tr *ngFor=\"let kor of svikorisnici; let i = index\">\r\n                        <td class=\"tablica text-center\">{{i+1}}.<\/td>\r\n                        <td class=\"tablica text-center\">{{kor.ime}}<\/td>\r\n                        <td class=\"tablica text-center\">{{kor.telefon}}<\/td>\r\n                        <td class=\"tablica text-center\">\r\n                          <button class=\"btn btn-info btn-sm\" (click)=\"urediKorisnika(kor)\"><i class=\"glyphicon glyphicon-edit\"><\/i><\/button>\r\n                          <button class=\"btn btn-danger btn-sm\" (click)=\"obrisiKorisnika(kor)\"><i class=\"glyphicon glyphicon-trash\"><\/i><\/button>\r\n                        <\/td>\r\n                      <\/tr>\r\n                    <\/tbody>\r\n                  <\/table>\r\n                <\/div>\r\n              <\/form>\r\n            <\/div>\r\n          <\/div>\r\n        <\/div>\r\n      <\/div> \r\n    <\/div><\/pre>\n
Forma na po\u010detku i bez podataka izgleda ovako:<\/p>\n
\"Angular<\/a><\/p>\n
Sada kada imam definiran izgled forme mogu kreirati opcije koje \u0107e joj dati funkcionalnost.<\/p>\n
Dodavanje (POST<\/em>)<\/h3>\n
\u0160to se dodavanja sadr\u017eaja ti\u010de nije ga mogu\u0107e dodati dok sva obavezna polja nisu unesena. U ovom slu\u010daju postoje dva polja, ime i prezime te broj telefona, i oba su obavezna. S obzirom da u formi za sada nema niti jednog korisnika  *ngIf=”ukupanbrojkorisnika < 1″<\/span>  prikezuje se poruka “Nema podataka”.<\/p>\n
dodajKorisnika(korisnik){\r\n     this._korisniciService.dodaj(korisnik).subscribe(\r\n      res => {\r\n        console.log(res);\r\n        this.dohvatiSveKorisnike();\r\n        this.korisnik.ime = ' ';\r\n        this.korisnik.telefon = ' ';\r\n      });\r\n  } <\/pre>\n
Nakon dodavanja korisnika popis se automatski osvje\u017eava i prikazuje sve dodane korisnike.<\/p>\n
\"Angular<\/a><\/p>\n
Pregled (GET<\/em>)<\/h3>\n
Kada se Angular<\/em> web aplikacija pokrene automatski se dohva\u0107a popis svih do tada unesenih korisnika. Za tu svrhu koristim ngOnInit()<\/span> \u0161to je dio Angular Lifecycle Hook<\/em><\/a>.<\/p>\n
ngOnInit() {\r\n      this.dohvatiSveKorisnike();\r\n    }\r\n\r\n    dohvatiSveKorisnike(){\r\n     this._korisniciService.svi().subscribe(res => {\r\n       console.log(res);\r\n       this.svikorisnici = res;\r\n       this.ukupanbrojkorisnika = res.length;\r\n      });\r\n    } <\/pre>\n
Tako\u0111er, odmah dohva\u0107am i du\u017einu niza this.ukupanbrojkorisnika = res.length;<\/span> kako bi mogao prikazati ukupan broj korisnika. <\/p>\n
\"Angular<\/a><\/p>\n
Ure\u0111ivanje (PUT<\/em>)<\/h3>\n
Kod ure\u0111ivanja korisnika imam dvije funkcije. Prva urediKorisnika();<\/span>  dohva\u0107a podatke odabranog korisnika i prikazuje ih u gornjoj formi za unos\/ure\u0111ivanje, a druga urediKorisnika2();<\/span> obavlja proces ure\u0111ivanja odabranog korisnika tj. \u0161alje nove podatke na API<\/em>.<\/p>\n
urediKorisnika(kor){\r\n      console.log(kor);\r\n      this.spremi = false;\r\n      this.korisnik.id = kor.id;\r\n      this.korisnik.ime = kor.ime;\r\n      this.korisnik.telefon = kor.telefon;\r\n  }\r\n\r\n  urediKorisnika2(korisnik){\r\n      console.log(korisnik);\r\n      this._korisniciService.uredi(korisnik).subscribe(\r\n        res => {\r\n          console.log(res);\r\n          this.dohvatiSveKorisnike();\r\n          this.korisnik.ime = ' ';\r\n          this.korisnik.telefon = ' ';\r\n          this.spremi = true;\r\n      });\r\n  }<\/pre>\n
Nakon \u0161to su novi podaci poslani popis korisnika se automatski osvje\u017eava, a gumb ‘Uredi’ ponovno postaje ‘Spremi’.<\/p>\n
\"Angular<\/a><\/p>\n
Brisanje (DELETE<\/em>)<\/h3>\n
Brisanje korisnika zadnji je korak izrade ovog CRUD<\/em> primjera. Nakon \u0161to je odabrani korisnik obrisan popis se automatski osvje\u017eava.<\/p>\n
obrisiKorisnika(kor){\r\n    let id = kor.id;\r\n    if(window.confirm('Jeste li sigurni da \u017eelite obrisati korisnika?')){\r\n    this._korisniciService.obrisi(id).subscribe(\r\n      res => {\r\n        console.log(res);\r\n        this.dohvatiSveKorisnike();\r\n    });\r\n    } \r\n  } <\/pre>\n
\"Angular<\/a><\/p>\n
Zaklju\u010dak<\/h2>\n
Ovo je bio jednostavan primjer Angular CRUD<\/em> forme. Mogao sam ovdje dodatno uljep\u0161ati izgled forme ili na druga\u010diji na\u010din slati upite na API<\/em>, ali mislim da je ovo sasvim dovoljno za po\u010detak jer kako god bilo kori\u0161tenjem ovog primjera mo\u017ee se napraviti funkcionalna forma za unos, pregled, ure\u0111ivanje i brisanje sadr\u017eaja.<\/p>\n
I za kraj, NPM<\/em> paketi kori\u0161teni u ovom primjeru<\/a>: <\/p>\n
{\r\n  \"name\": \"angular-crud\",\r\n  \"version\": \"0.0.0\",\r\n  \"license\": \"MIT\",\r\n  \"scripts\": {\r\n    \"ng\": \"ng\",\r\n    \"start\": \"ng serve\",\r\n    \"build\": \"ng build\",\r\n    \"test\": \"ng test\",\r\n    \"lint\": \"ng lint\",\r\n    \"e2e\": \"ng e2e\"\r\n  },\r\n  \"private\": true,\r\n  \"dependencies\": {\r\n    \"@angular\/animations\": \"^4.2.4\",\r\n    \"@angular\/common\": \"^4.2.4\",\r\n    \"@angular\/compiler\": \"^4.2.4\",\r\n    \"@angular\/core\": \"^4.2.4\",\r\n    \"@angular\/forms\": \"^4.2.4\",\r\n    \"@angular\/http\": \"^4.2.4\",\r\n    \"@angular\/platform-browser\": \"^4.2.4\",\r\n    \"@angular\/platform-browser-dynamic\": \"^4.2.4\",\r\n    \"@angular\/router\": \"^4.2.4\",\r\n    \"core-js\": \"^2.4.1\",\r\n    \"rxjs\": \"^5.4.2\",\r\n    \"zone.js\": \"^0.8.14\"\r\n  },\r\n  \"devDependencies\": {\r\n    \"@angular\/cli\": \"1.4.7\",\r\n    \"@angular\/compiler-cli\": \"^4.2.4\",\r\n    \"@angular\/language-service\": \"^4.2.4\",\r\n    \"@types\/jasmine\": \"~2.5.53\",\r\n    \"@types\/jasminewd2\": \"~2.0.2\",\r\n    \"@types\/node\": \"~6.0.60\",\r\n    \"codelyzer\": \"~3.2.0\",\r\n    \"jasmine-core\": \"~2.6.2\",\r\n    \"jasmine-spec-reporter\": \"~4.1.0\",\r\n    \"karma\": \"~1.7.0\",\r\n    \"karma-chrome-launcher\": \"~2.1.1\",\r\n    \"karma-cli\": \"~1.0.1\",\r\n    \"karma-coverage-istanbul-reporter\": \"^1.2.1\",\r\n    \"karma-jasmine\": \"~1.1.0\",\r\n    \"karma-jasmine-html-reporter\": \"^0.2.2\",\r\n    \"protractor\": \"~5.1.2\",\r\n    \"ts-node\": \"~3.2.0\",\r\n    \"tslint\": \"~5.7.0\",\r\n    \"typescript\": \"~2.3.3\"\r\n  }\r\n}<\/pre>\n","protected":false},"excerpt":{"rendered":"
U ovom \u0107u blog postu napraviti jednostavnu Angular CRUD (create, read, update, delete) aplikaciju koja \u0107e se sastojati od forme za pregled podataka uz mogu\u0107nost dodavanja, ure\u0111ivanja i brisanja podataka. CRUD operacije ne\u0161to su s \u010dime se svaki web developer naj\u010de\u0161\u0107e susre\u0107e i zato bi ovaj primjer posebno mogao biti koristan novim developerima ili onima … Nastavi \u010ditati Angular CRUD aplikacija<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":6443,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[566,351],"tags":[471,472,460],"class_list":["post-6442","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-frontend","category-razvoj","tag-angular","tag-angular-cli","tag-crud"],"yoast_head":"\nAngular CRUD aplikacija - Tomislav Stankovi\u0107<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.tomislavstankovic.com\/blog\/angular-crud-aplikacija\/\" \/>\n<meta property=\"og:locale\" content=\"hr_HR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Angular CRUD aplikacija - Tomislav Stankovi\u0107\" \/>\n<meta property=\"og:description\" content=\"U ovom \u0107u blog postu napraviti jednostavnu Angular CRUD (create, read, update, delete) aplikaciju koja \u0107e se sastojati od forme za pregled podataka uz mogu\u0107nost dodavanja, ure\u0111ivanja i brisanja podataka. 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