rsnext/examples/cms-datocms/README.md
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# A statically generated blog example using Next.js and DatoCMS
This example showcases Next.js's [Static Generation](/docs/basic-features/pages.md) feature using [DatoCMS](https://www.datocms.com/) as the data source.
## How to use
### Using `create-next-app`
Execute [`create-next-app`](https://github.com/zeit/next.js/tree/canary/packages/create-next-app) with [npm](https://docs.npmjs.com/cli/init) or [Yarn](https://yarnpkg.com/lang/en/docs/cli/create/) to bootstrap the example:
```bash
npm init next-app --example cms-datocms cms-datocms-app
# or
yarn create next-app --example cms-datocms cms-datocms-app
```
### Download manually
Download the example:
```bash
curl https://codeload.github.com/zeit/next.js/tar.gz/canary | tar -xz --strip=2 next.js-canary/examples/cms-datocms
cd cms-datocms
```
## Configuration
### Step 1. Create an account and a project on DatoCMS
First, [create an account on DatoCMS](https://datocms.com).
After creating an account, create a **new project** from the dashboard. You can select a **Blank Project**.
### Step 2. Create an `Author` model
From the project setting page, create a new **Model**.
- The name should be `Author`.
Next, add these fields (you don't have to modify the settings):
- `Name` - **Text** field (**Single-line String**)
- `Picture` - **Media** field (**Single asset**)
### Step 3. Create a `Post` model
From the project setting page, create a new **Model**:
- The name should be `Post`.
- **Important:** From the "Additional Settings" tab, turn on **Enable draft/published system.** This lets you preview the content.
Next, add these fields (you don't have to modify the settings unless specified):
- `Title` - **Text** field (**Single-line String**)
- `Content` - **Text** field (**Multiple-paragraph Text**)
- `Excerpt` - **Text** field (**Single-line String**)
- `Cover Image` - **Media** field (**Single asset**)
- `Date` - **Date and time** field (**Date**)
- `Author` - **Links** field (**Single link**) , and from the "Validations" tab under "Accept only specified model", select **Author**.
- `Slug` - **SEO** field (**Slug**), and from the "Validations" tab under "Reference field" select **Title**.
### Step 4. Populate Content
From the **Content** menu at the top, select **Author** and create a new record.
- You just need **1 Author record**.
- Use dummy data for the text.
- For the image, you can download one from [Unsplash](https://unsplash.com/).
Next, select **Post** and create a new record.
- We recommend creating at least **2 Post records**.
- Use dummy data for the text.
- You can write markdown for the **Content** field.
- For the images, you can download ones from [Unsplash](https://unsplash.com/).
- Pick the **Author** you created earlier.
**Important:** For each post record, you need to click **Publish** after saving. If not, the post will be in the draft state.
### Step 5. Set up environment variables
Go to the **Settings** menu at the top and click **API tokens**.
Then click **Read-only API token** and copy the token.
Next, copy the `.env.example` file in this directory to `.env` (which will be ignored by Git):
```bash
cp .env.example .env
```
Then set each variable on `.env`:
- `NEXT_EXAMPLE_CMS_DATOCMS_API_TOKEN` should be the API token you just copied.
- `NEXT_EXAMPLE_CMS_DATOCMS_PREVIEW_SECRET` can be any random string (but avoid spaces), like `MY_SECRET` - this is used for [the Preview Mode](/docs/advanced-features/preview-mode.md).
Your `.env` file should look like this:
```bash
NEXT_EXAMPLE_CMS_DATOCMS_API_TOKEN=...
NEXT_EXAMPLE_CMS_DATOCMS_PREVIEW_SECRET=...
```
### Step 6. Run Next.js in development mode
```bash
npm install
npm run dev
# or
yarn install
yarn dev
```
Your blog should be up and running on [http://localhost:3000](http://localhost:3000)! If it doesn't work, post on [GitHub discussions](https://github.com/zeit/next.js/discussions).
### Step 7. Try preview mode
On DatoCMS, go to one of the posts you've created and:
- **Update the title**. For example, you can add `[Draft]` in front of the title.
- Click **Save**, but **DO NOT** click **Publish**. By doing this, the post will be in the draft state.
(If it doesn't become draft, you need to go to the model settings for `Post`, go to **Additional Settings**, and turn on **Enable draft/published system**.)
Now, if you go to the post page on localhost, you won't see the updated title. However, if you use the **Preview Mode**, you'll be able to see the change ([Documentation](/docs/advanced-features/preview-mode.md)).
To enable the Preview Mode, go to this URL:
```
http://localhost:3000/api/preview?secret=<secret>&slug=<slug>
```
- `<secret>` should be the string you entered for `NEXT_EXAMPLE_CMS_DATOCMS_PREVIEW_SECRET`.
- `<slug>` should be the post's `slug` attribute (you can check on DatoCMS).
You should now be able to see the updated title. To exit the preview mode, you can click **Click here to exit preview mode** at the top.
### Step 8. Deploy on ZEIT Now
You can deploy this app to the cloud with [ZEIT Now](https://zeit.co/import?filter=next.js&utm_source=github&utm_medium=readme&utm_campaign=next-example) ([Documentation](https://nextjs.org/docs/deployment)).
To deploy on ZEIT Now, you need to set the environment variables with **Now Secrets** using [Now CLI](https://zeit.co/download) ([Documentation](https://zeit.co/docs/now-cli#commands/secrets)).
Install [Now CLI](https://zeit.co/download), log in to your account from the CLI, and run the following commands to add the environment variables. Replace `<NEXT_EXAMPLE_CMS_DATOCMS_API_TOKEN>` and `<NEXT_EXAMPLE_CMS_DATOCMS_PREVIEW_SECRET>` with the corresponding strings in `.env`.
```
now secrets add next_example_cms_datocms_api_token <NEXT_EXAMPLE_CMS_DATOCMS_API_TOKEN>
now secrets add next_example_cms_datocms_preview_secret <NEXT_EXAMPLE_CMS_DATOCMS_PREVIEW_SECRET>
```
Then push the project to GitHub/GitLab/Bitbucket and [import to ZEIT Now](https://zeit.co/import?filter=next.js&utm_source=github&utm_medium=readme&utm_campaign=next-example) to deploy.