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Getting Started with Next.js

This integration guide follows the Quick Start Guide and assumes you have you have fully completed the "Hands-on" path. You should be able to consume the API by browsing the URL http://localhost:1337/api/restaurants.

If you haven't gone through the Quick Start Guide, the way you request a Strapi API with Next.js remains the same except that you do not fetch the same content.

Create a Next.js app​

Create a basic Next.js application.

yarn create next-app nextjs-app

Use an HTTP client​

Many HTTP clients are available but in this documentation we'll use Axios and Fetch.

yarn add axios

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/api/restaurants').then(response => {
  console.log(response.data);
});
Example response
{
  "data": [
    {
      "id": 1,
      "attributes": {
        "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.",
        "createdAt": "2022-07-31T09:14:12.569Z",
        "updatedAt": "2022-07-31T09:14:12.569Z",
        "publishedAt": "2022-07-31T09:14:12.569Z"
      }
    }
  ],
  "meta": {
    "pagination": {
      "page": 1,
      "pageSize": 25,
      "pageCount": 1,
      "total": 1
    }
  }
}

Example​

./pages/index.js

import axios from 'axios';

const Home = ({ restaurants, error }) => {
  if (error) {
    return <div>An error occured: {error.message}</div>;
  }
  return (
    <ul>
      {restaurants.data.map(restaurant => (
        <li key={restaurant.id}>{restaurant.attributes.name}</li>
      ))}
    </ul>
  );
};

Home.getInitialProps = async ctx => {
  try {
    const res = await axios.get('http://localhost:1337/api/restaurants');
    const restaurants = res.data;
    return { restaurants };
  } catch (error) {
    return { error };
  }
};

export default Home;

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 for the category Collection type. Add the ?populate=categories query parameter to return categories with the response.

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/api/restaurants/?populate=categories', {
    data: {
      name: 'Dolemon Sushi',
      description:
        'Unmissable Japanese Sushi restaurant. The cheese and salmon makis are delicious',
      categories: [3],
    },
  })
  .then(response => {
    console.log(response);
  });
Example response
{
  "data": {
    "id": 2,
    "attributes": {
      "name": "Dolemon Sushi",
      "description": "Unmissable Japanese Sushi restaurant. The cheese and salmon makis are delicious",
      "createdAt": "2022-07-31T09:14:12.569Z",
      "updatedAt": "2022-07-31T09:14:12.569Z",
      "publishedAt": "2022-07-31T09:14:12.566Z",
      "categories": {
        "data": [
          {
            "id": 3,
            "attributes": {
              "name": "Japanese",
              "createdAt": "2022-07-31T10:49:03.933Z",
              "updatedAt": "2022-07-31T10:49:04.893Z",
              "publishedAt": "2022-07-31T10:49:04.890Z"
            }
          }
        ]
      }
    }
  },
  "meta": {}
}

Example​

./pages/index.js

import { useState } from 'react';
import axios from 'axios';

const Home = ({ allCategories, errorCategories }) => {
  const [modifiedData, setModifiedData] = useState({
    name: '',
    description: '',
    categories: [],
  });
  const [errorRestaurants, setErrorRestaurants] = useState(null);

  const handleChange = ({ target: { name, value } }) => {
    setModifiedData(prev => ({
      ...prev,
      [name]: value,
    }));
  };

  const handleSubmit = async e => {
    e.preventDefault();

    try {
      const response = await axios.post('http://localhost:1337/api/restaurants', {
        data: modifiedData,
      });
      console.log(response);
    } catch (error) {
      setErrorRestaurants(error);
    }
  };

  const renderCheckbox = category => {
    const { categories } = modifiedData;
    const isChecked = categories.includes(category.id);
    const handleCheckboxChange = () => {
      if (!categories.includes(category.id)) {
        handleChange({ target: { name: 'categories', value: categories.concat(category.id) } });
      } else {
        handleChange({
          target: { name: 'categories', value: categories.filter(v => v !== category.id) },
        });
      }
    };
    return (
      <div key={category.id}>
        <label htmlFor={category.id}>{category.attributes.name}</label>
        <input
          type="checkbox"
          checked={isChecked}
          onChange={handleCheckboxChange}
          name="categories"
          id={category.id}
        />
      </div>
    );
  };
  if (errorCategories) {
    return <div>An error occured (categories): {errorCategories.message}</div>;
  }
  if (errorRestaurants) {
    return <div>An error occured (restaurants): {errorRestaurants.message}</div>;
  }
  return (
    <div>
      <form onSubmit={handleSubmit}>
        <h3>Restaurants</h3>
        <br />
        <label>
          Name:
          <input type="text" name="name" value={modifiedData.name} onChange={handleChange} />
        </label>
        <label>
          Description:
          <input
            type="text"
            name="description"
            value={modifiedData.description}
            onChange={handleChange}
          />
        </label>
        <div>
          <br />
          <b>Select categories</b>
          <br />
          {allCategories.data.map(renderCheckbox)}
        </div>
        <br />
        <button type="submit">Submit</button>
      </form>
    </div>
  );
};

Home.getInitialProps = async ctx => {
  try {
    const res = await axios.get('http://localhost:1337/api/categories');
    const allCategories = res.data;
    return { allCategories };
  } catch (errorCategories) {
    return { errorCategories };
  }
};

export default Home;

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/api/restaurants/2/?populate=categories', {
    data: {
      categories: [2],
    },
  })
  .then(response => {
    console.log(response);
  });
Example response
{
  "data": {
    "id": 2,
    "attributes": {
      "name": "Dolemon Sushi",
      "description": "Unmissable Japanese Sushi restaurant. The cheese and salmon makis are delicious",
      "createdAt": "2022-07-31T09:14:12.569Z",
      "updatedAt": "2022-07-31T11:17:31.598Z",
      "publishedAt": "2022-07-31T09:14:12.566Z",
      "categories": {
        "data": [
          {
            "id": 2,
            "attributes": {
              "name": "Brunch",
              "createdAt": "2022-07-30T09:23:57.857Z",
              "updatedAt": "2022-07-30T09:26:37.236Z",
              "publishedAt": "2022-07-30T09:26:37.233Z"
            }
          }
        ]
      }
    }
  },
  "meta": {}
}