Getting Started with Angular

This integration guide is following the Quick Start Guide. We assume that you have fully completed its "Hands-on" path, and therefore can consume the API by browsing this url (opens new window).

If you haven't gone through the Quick Start Guide, the way you request a Strapi API with Angular (opens new window) remains the same except that you will not fetch the same content.

Create a Angular app

Create a basic Angular application using angular CLI (opens new window).

npx -p @angular/cli ng new angular-app

Use an HTTP client

Many HTTP clients are available but in this documentation we'll use Axios (opens new window) and Fetch (opens new window).

yarn add axios

No installation needed

GET Request your collection type

Execute a GET request on the restaurant Collection Type in order to fetch all your restaurants.

Be sure that you activated the find permission for the restaurant Collection Type.

Example GET request with axios

import axios from 'axios';

axios.get('http://localhost:1337/restaurants').then(response => {
  console.log(response);
});

Example GET request with fetch

fetch('http://localhost:1337/restaurants', {
  method: 'GET',
  headers: {
    'Content-Type': 'application/json',
  },
})
  .then(response => response.json())
  .then(data => console.log(data));

Example response

[
  {
    "id": 1,
    "name": "Biscotte Restaurant",
    "description": "Welcome to Biscotte restaurant! Restaurant Biscotte offers a cuisine based on fresh, quality products, often local, organic when possible, and always produced by passionate producers.",
    "created_by": {
      "id": 1,
      "firstname": "Paul",
      "lastname": "Bocuse",
      "username": null
    },
    "updated_by": {
      "id": 1,
      "firstname": "Paul",
      "lastname": "Bocuse",
      "username": null
    },
    "created_at": "2020-07-31T11:37:16.964Z",
    "updated_at": "2020-07-31T11:37:16.975Z",
    "categories": [
      {
        "id": 1,
        "name": "French Food",
        "created_by": 1,
        "updated_by": 1,
        "created_at": "2020-07-31T11:36:23.164Z",
        "updated_at": "2020-07-31T11:36:23.172Z"
      }
    ]
  }
]

Example

./src/app/app.component.ts

import { Component, OnInit } from '@angular/core';
import axios from 'axios';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css'],
})
export class AppComponent implements OnInit {
  title = 'angular-app';
  restaurants = [];
  error = null;

  async ngOnInit() {
    try {
      const response = await axios.get('http://localhost:1337/restaurants');
      this.restaurants = response.data;
    } catch (error) {
      this.error = error;
    }
  }
}

./src/app/app.component.ts

import { Component, OnInit } from '@angular/core';

const parseJSON = resp => (resp.json ? resp.json() : resp);

// Checks if a network request came back fine, and throws an error if not
const checkStatus = resp => {
  if (resp.status >= 200 && resp.status < 300) {
    return resp;
  }
  return parseJSON(resp).then(resp => {
    throw resp;
  });
};
const headers = {
  'Content-Type': 'application/json',
};

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css'],
})
export class AppComponent implements OnInit {
  title = 'angular-app';
  restaurants = [];
  error = null;

  async ngOnInit() {
    try {
      const restaurants = await fetch('http://localhost:1337/restaurants', {
        method: 'GET',
        headers: headers,
      })
        .then(checkStatus)
        .then(parseJSON);
      this.restaurants = restaurants;
    } catch (error) {
      this.error = error;
    }
  }
}

./src/app/app.component.html

<div *ngIf="error">
  {{ error }}
</div>

<ul>
  <li *ngFor="let restaurant of restaurants">{{ restaurant['name'] }}</li>
</ul>

POST Request your collection type

Execute a POST request on the restaurant Collection Type in order to create a restaurant.

Be sure that you activated the create permission for the restaurant Collection Type and the find permission fot the category Collection type.

In this example a japanese category has been created which has the id: 3.

Example POST request with axios

import axios from 'axios';

axios
  .post('http://localhost:1337/restaurants', {
    name: 'Dolemon Sushi',
    description: 'Unmissable Japanese Sushi restaurant. The cheese and salmon makis are delicious',
    categories: [3],
  })
  .then(response => {
    console.log(response);
  });

Example POST request with fetch

fetch('http://localhost:1337/restaurants', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    name: 'Dolemon Sushi',
    description: 'Unmissable Japanese Sushi restaurant. The cheese and salmon makis are delicious',
    categories: [3],
  }),
})
  .then(response => response.json())
  .then(data => console.log(data));

Example response

{
  "id": 2,
  "name": "Dolemon Sushi",
  "description": "Unmissable Japanese Sushi restaurant. The cheese and salmon makis are delicious",
  "created_by": null,
  "updated_by": null,
  "created_at": "2020-08-04T09:57:11.669Z",
  "updated_at": "2020-08-04T09:57:11.669Z",
  "categories": [
    {
      "id": 3,
      "name": "Japanese",
      "created_by": 1,
      "updated_by": 1,
      "created_at": "2020-07-31T11:36:23.164Z",
      "updated_at": "2020-07-31T11:36:23.172Z"
    }
  ]
}

Example

./src/app.module.ts

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { FormsModule, ReactiveFormsModule } from '@angular/forms';

import { AppComponent } from './app.component';

@NgModule({
  declarations: [AppComponent],
  imports: [BrowserModule, FormsModule, ReactiveFormsModule],
  providers: [],
  bootstrap: [AppComponent],
})
export class AppModule {}

./src/app/app.component.ts

import { Component, OnInit } from '@angular/core';
import { FormBuilder, FormArray, FormControl } from '@angular/forms';
import axios from 'axios'

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})

export class AppComponent implements OnInit {
  modifiedData;

  constructor(
    private formBuilder: FormBuilder,
  ) {
    this.modifiedData = this.formBuilder.group({
      name: '',
      description: '',
      categories: new FormArray([]),
    });
  }

  onCheckChange(event) {
    const formArray: FormArray = this.modifiedData.get('categories') as FormArray;

    if (event.target.checked) {
      formArray.push(new FormControl(event.target.value));
    }
    else {
      let i: number = 0;

      formArray.controls.forEach((ctrl: FormControl) => {
        if (ctrl.value == event.target.value) {
          formArray.removeAt(i);
          return;
        }
        i++;
      });
    }
  }

  title = 'angular-app';
  allCategories = [];
  error = null;

  async ngOnInit() {
    try {
      const response = await axios.get('http://localhost:1337/categories');
      this.allCategories = response.data
    } catch (error) {
      this.error = error
    }
    console.log(this.allCategories);
  }

  async onSubmit(restaurantData) {
    try {
      const response = await axios.post(
        'http://localhost:1337/restaurants',
        restaurantData
      );
      console.log(response);
    } catch (error) {
      this.error = error;
    }
    this.modifiedData.reset();
  }

}

./src/app/app.component.ts

import { Component, OnInit } from '@angular/core';
import { FormBuilder, FormArray, FormControl } from '@angular/forms';

const parseJSON = resp => (resp.json ? resp.json() : resp);

// Checks if a network request came back fine, and throws an error if not
const checkStatus = resp => {
  if (resp.status >= 200 && resp.status < 300) {
    return resp;
  }
  return parseJSON(resp).then(resp => {
    throw resp;
  });
};
const headers = {
  'Content-Type': 'application/json',
};

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})

export class AppComponent implements OnInit {
  modifiedData;

  constructor(
    private formBuilder: FormBuilder,
  ) {
    this.modifiedData = this.formBuilder.group({
      name: '',
      description: '',
      categories: new FormArray([]),
    });
  }

  onCheckChange(event) {
    const formArray: FormArray = this.modifiedData.get('categories') as FormArray;

    if (event.target.checked) {
      formArray.push(new FormControl(event.target.value));
    }
    else {
      let i: number = 0;

      formArray.controls.forEach((ctrl: FormControl) => {
        if (ctrl.value == event.target.value) {
          formArray.removeAt(i);
          return;
        }
        i++;
      });
    }
  }

  title = 'angular-app';
  allCategories = [];
  error = null;

  async ngOnInit() {
    try {
      const allCategories = await fetch('http://localhost:1337/categories', {
        method: 'GET',
        headers: headers,
      })
        .then(checkStatus)
        .then(parseJSON);
      this.allCategories = allCategories;
    } catch (error) {
      this.error = error
    }
    console.log(this.allCategories);
  }

  async onSubmit(restaurantData) {
    try {
      await fetch('http://localhost:1337/restaurants', {
        method: 'POST',
        headers: headers,
        body: JSON.stringify(restaurantData),
      })
        .then(checkStatus)
        .then(parseJSON);
    } catch (error) {
      this.error = error
    }
    this.modifiedData.reset();
  }
}

./src/app/app.component.html

<div *ngIf="error">
  {{ error }}
</div>

<form [formGroup]="modifiedData" (ngSubmit)="onSubmit(modifiedData.value)">
  <div>
    <label for="name">
      Name
    </label>
    <input id="name" type="text" formControlName="name" />
  </div>

  <div>
    <label for="address">
      Description
    </label>
    <input id="description" type="text" formControlName="description" />
  </div>

  <div *ngIf="allCategories">
    <br />
    Select categories
    <div *ngFor="let category of allCategories">
      <label>{{ category.name }}</label>
      <input [value]="category.id" type="checkbox" (change)="onCheckChange($event)" />
    </div>
  </div>

  <button class="button" type="submit">Create</button>
</form>

PUT Request your collection type

Execute a PUT request on the restaurant Collection Type in order to update the category of a restaurant.

Be sure that you activated the put permission for the restaurant Collection Type.

We consider that the id of your restaurant is 2. and the id of your category is 2.

Example PUT request with axios

import axios from 'axios';

axios
  .put('http://localhost:1337/restaurants/2', {
    categories: [2],
  })
  .then(response => {
    console.log(response);
  });

Example PUT request with fetch

fetch('http://localhost:1337/restaurants/2', {
  method: 'PUT',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    categories: [2],
  }),
})
  .then(response => response.json())
  .then(data => {
    console.log(data);
  });

Example response

{
  "id": 2,
  "name": "Dolemon Sushi",
  "description": "Unmissable Japanese Sushi restaurant. The cheese and salmon makis are delicious",
  "created_by": null,
  "updated_by": null,
  "created_at": "2020-08-04T10:21:30.219Z",
  "updated_at": "2020-08-04T10:21:30.219Z",
  "categories": [
    {
      "id": 2,
      "name": "Brunch",
      "created_by": 1,
      "updated_by": 1,
      "created_at": "2020-08-04T10:24:26.901Z",
      "updated_at": "2020-08-04T10:24:26.911Z"
    }
  ]
}

Starter

• Angular Blog starter (opens new window)

Conclusion

Here is how to request your Collection Types in Strapi using Angular. When you create a Collection Type or a Single Type you will have a certain number of REST API endpoints available to interact with.