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  2. N8N
  3. Using handlebars.js

Using handlebars.js

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  • girishG girish

    @brutalbirdie looks like N8N_CUSTOM_EXTENSIONS is for custom nodes - https://docs.n8n.io/getting-started/installation/advanced/configuration.html#examples and not for custom node modules

    jeauJ Offline
    jeauJ Offline
    jeau
    App Dev
    wrote on last edited by
    #6

    thanks to all, I am a newbe with n8n

    @girish @BrutalBirdie this doc indicate that for security reasons, importing modules is restricted by default in the Function-Nodes and that it is possible to lift that restriction by setting the following environment variables:

    • NODE_FUNCTION_ALLOW_BUILTIN: For builtin modules
    • NODE_FUNCTION_ALLOW_EXTERNAL: For external modules sourced from n8n/node_modules directory

    So I created a node_modules directory in /app/data/ and installed in it the module handlebars with the command npm install handlebars but it doesn't work. I also tried in /app/data/.n8n directory with the same result.

    girishG 1 Reply Last reply
    0
    • jeauJ jeau

      thanks to all, I am a newbe with n8n

      @girish @BrutalBirdie this doc indicate that for security reasons, importing modules is restricted by default in the Function-Nodes and that it is possible to lift that restriction by setting the following environment variables:

      • NODE_FUNCTION_ALLOW_BUILTIN: For builtin modules
      • NODE_FUNCTION_ALLOW_EXTERNAL: For external modules sourced from n8n/node_modules directory

      So I created a node_modules directory in /app/data/ and installed in it the module handlebars with the command npm install handlebars but it doesn't work. I also tried in /app/data/.n8n directory with the same result.

      girishG Offline
      girishG Offline
      girish
      Staff
      wrote on last edited by
      #7

      @jeau I think the module has to be installed in the docker image itself. Is there a way to not use handlebars? Just curious why it's needed. Maybe we can add it to the n8n image itself.

      jeauJ 1 Reply Last reply
      0
      • girishG girish

        @jeau I think the module has to be installed in the docker image itself. Is there a way to not use handlebars? Just curious why it's needed. Maybe we can add it to the n8n image itself.

        jeauJ Offline
        jeauJ Offline
        jeau
        App Dev
        wrote on last edited by jeau
        #8

        @girish you can read this discussion https://community.n8n.io/t/text-templating-node/1965

        handelbars is a template system to facilitate the creation of html document pages, https://handlebarsjs.com/

        in my case, I want to get information from baserow tables and use n8n to generate reports and send them by mails

        girishG 1 Reply Last reply
        0
        • jeauJ jeau

          @girish you can read this discussion https://community.n8n.io/t/text-templating-node/1965

          handelbars is a template system to facilitate the creation of html document pages, https://handlebarsjs.com/

          in my case, I want to get information from baserow tables and use n8n to generate reports and send them by mails

          girishG Offline
          girishG Offline
          girish
          Staff
          wrote on last edited by
          #9

          @jeau there is a env var NODE_PATH that tells node where to find additional node modules. So, you can set the variable in /app/data/env like NODE_PATH=/app/data/modules and then in Web Terminal:

          mkdir /app/data/modules
          cd /app/data/modules
          npm install handlebars
          

          Restart the app afterwards.

          jeauJ 1 Reply Last reply
          2
          • girishG girish

            @jeau there is a env var NODE_PATH that tells node where to find additional node modules. So, you can set the variable in /app/data/env like NODE_PATH=/app/data/modules and then in Web Terminal:

            mkdir /app/data/modules
            cd /app/data/modules
            npm install handlebars
            

            Restart the app afterwards.

            jeauJ Offline
            jeauJ Offline
            jeau
            App Dev
            wrote on last edited by
            #10

            @girish thanks, however I have this errors after passing the command npm install handlebars

            npm ERR! code EROFS
            npm ERR! syscall open
            npm ERR! path /root/.npm/_cacache/tmp/2122bb8f
            npm ERR! errno -30
            npm ERR! rofs EROFS: read-only file system, open '/root/.npm/_cacache/tmp/2122bb8f'
            npm ERR! rofs Often virtualized file systems, or other file systems
            npm ERR! rofs that don't support symlinks, give this error.
            

            I tried npm install --prefix /app/data/modules handlebars but the result was the same

            however, I have already successfully installed handelbars before, but I forgot how to do it šŸ˜ž

            robiR girishG 2 Replies Last reply
            0
            • jeauJ jeau

              @girish thanks, however I have this errors after passing the command npm install handlebars

              npm ERR! code EROFS
              npm ERR! syscall open
              npm ERR! path /root/.npm/_cacache/tmp/2122bb8f
              npm ERR! errno -30
              npm ERR! rofs EROFS: read-only file system, open '/root/.npm/_cacache/tmp/2122bb8f'
              npm ERR! rofs Often virtualized file systems, or other file systems
              npm ERR! rofs that don't support symlinks, give this error.
              

              I tried npm install --prefix /app/data/modules handlebars but the result was the same

              however, I have already successfully installed handelbars before, but I forgot how to do it šŸ˜ž

              robiR Offline
              robiR Offline
              robi
              wrote on last edited by
              #11
              This post is deleted!
              1 Reply Last reply
              0
              • jeauJ jeau

                @girish thanks, however I have this errors after passing the command npm install handlebars

                npm ERR! code EROFS
                npm ERR! syscall open
                npm ERR! path /root/.npm/_cacache/tmp/2122bb8f
                npm ERR! errno -30
                npm ERR! rofs EROFS: read-only file system, open '/root/.npm/_cacache/tmp/2122bb8f'
                npm ERR! rofs Often virtualized file systems, or other file systems
                npm ERR! rofs that don't support symlinks, give this error.
                

                I tried npm install --prefix /app/data/modules handlebars but the result was the same

                however, I have already successfully installed handelbars before, but I forgot how to do it šŸ˜ž

                girishG Offline
                girishG Offline
                girish
                Staff
                wrote on last edited by
                #12

                @jeau I can fix that . Can you try npm install handlebars --cache /tmp/foo in the meantime ?

                jeauJ 1 Reply Last reply
                0
                • girishG girish

                  @jeau I can fix that . Can you try npm install handlebars --cache /tmp/foo in the meantime ?

                  jeauJ Offline
                  jeauJ Offline
                  jeau
                  App Dev
                  wrote on last edited by
                  #13

                  @girish I went back to a fresh installation, because I had not checked the changes of the recent updates. This fix allows me to install handelbars. But it still doesn't work, I still get the message Cannot find module 'handlebars' with this example.

                  My session:

                  root@XYZ:/app/data# vi env
                  root@XYZ:/app/data# cat env
                  # Set the logging level to 'debug'
                  export EXECUTIONS_DATA_SAVE_MANUAL_EXECUTIONS=true
                  export EXECUTIONS_DATA_SAVE_ON_ERROR=all
                  export EXECUTIONS_DATA_SAVE_ON_SUCCESS=all
                  export N8N_LOG_LEVEL=info
                  export NODE_PATH=/app/data/modules
                  export NODE_FUNCTION_ALLOW_EXTERNAL=handlebars
                  root@XYZ:/app/data# mkdir modules
                  root@XYZ:/app/data# cd /app/data/modules
                  root@XYZ:/app/data/modules# npm install handlebars --cache /tmp/foo
                  npm WARN saveError ENOENT: no such file or directory, open '/app/data/modules/package.json'
                  npm notice created a lockfile as package-lock.json. You should commit this file.
                  npm WARN enoent ENOENT: no such file or directory, open '/app/data/modules/package.json'
                  npm WARN modules No description
                  npm WARN modules No repository field.
                  npm WARN modules No README data
                  npm WARN modules No license field.
                  
                  + handlebars@4.7.7
                  added 6 packages from 39 contributors and audited 6 packages in 0.834s
                  found 0 vulnerabilities
                  
                  ā”Œā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”
                  │              npm update check failed              │
                  │        Try running with sudo or get access        │
                  │       to the local update config store via        │
                  │ sudo chown -R $USER:$(id -gn $USER) /root/.config │
                  ā””ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”˜
                  root@XYZ:/app/data/modules# ls -al
                  total 16
                  drwxr-xr-x 3 root     root     4096 Oct  9 16:25 .
                  drwxr-xr-x 8 cloudron cloudron 4096 Oct  9 16:23 ..
                  drwxr-xr-x 9 root     root     4096 Oct  9 16:25 node_modules
                  -rw-r--r-- 1 root     root     1711 Oct  9 16:25 package-lock.json
                  root@XYZ:/app/data/modules# ls -al node_modules/
                  total 36
                  drwxr-xr-x 9 root root 4096 Oct  9 16:25 .
                  drwxr-xr-x 3 root root 4096 Oct  9 16:25 ..
                  drwxr-xr-x 2 root root 4096 Oct  9 16:25 .bin
                  drwxr-xr-x 6 root root 4096 Oct  9 16:25 handlebars
                  drwxr-xr-x 4 root root 4096 Oct  9 16:25 minimist
                  drwxr-xr-x 2 root root 4096 Oct  9 16:25 neo-async
                  drwxr-xr-x 4 root root 4096 Oct  9 16:25 source-map
                  drwxr-xr-x 5 root root 4096 Oct  9 16:25 uglify-js
                  drwxr-xr-x 4 root root 4096 Oct  9 16:25 wordwrap
                  root@XYZ:/app/data/modules#
                  
                  girishG 1 Reply Last reply
                  0
                  • jeauJ jeau

                    @girish I went back to a fresh installation, because I had not checked the changes of the recent updates. This fix allows me to install handelbars. But it still doesn't work, I still get the message Cannot find module 'handlebars' with this example.

                    My session:

                    root@XYZ:/app/data# vi env
                    root@XYZ:/app/data# cat env
                    # Set the logging level to 'debug'
                    export EXECUTIONS_DATA_SAVE_MANUAL_EXECUTIONS=true
                    export EXECUTIONS_DATA_SAVE_ON_ERROR=all
                    export EXECUTIONS_DATA_SAVE_ON_SUCCESS=all
                    export N8N_LOG_LEVEL=info
                    export NODE_PATH=/app/data/modules
                    export NODE_FUNCTION_ALLOW_EXTERNAL=handlebars
                    root@XYZ:/app/data# mkdir modules
                    root@XYZ:/app/data# cd /app/data/modules
                    root@XYZ:/app/data/modules# npm install handlebars --cache /tmp/foo
                    npm WARN saveError ENOENT: no such file or directory, open '/app/data/modules/package.json'
                    npm notice created a lockfile as package-lock.json. You should commit this file.
                    npm WARN enoent ENOENT: no such file or directory, open '/app/data/modules/package.json'
                    npm WARN modules No description
                    npm WARN modules No repository field.
                    npm WARN modules No README data
                    npm WARN modules No license field.
                    
                    + handlebars@4.7.7
                    added 6 packages from 39 contributors and audited 6 packages in 0.834s
                    found 0 vulnerabilities
                    
                    ā”Œā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”
                    │              npm update check failed              │
                    │        Try running with sudo or get access        │
                    │       to the local update config store via        │
                    │ sudo chown -R $USER:$(id -gn $USER) /root/.config │
                    ā””ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”€ā”˜
                    root@XYZ:/app/data/modules# ls -al
                    total 16
                    drwxr-xr-x 3 root     root     4096 Oct  9 16:25 .
                    drwxr-xr-x 8 cloudron cloudron 4096 Oct  9 16:23 ..
                    drwxr-xr-x 9 root     root     4096 Oct  9 16:25 node_modules
                    -rw-r--r-- 1 root     root     1711 Oct  9 16:25 package-lock.json
                    root@XYZ:/app/data/modules# ls -al node_modules/
                    total 36
                    drwxr-xr-x 9 root root 4096 Oct  9 16:25 .
                    drwxr-xr-x 3 root root 4096 Oct  9 16:25 ..
                    drwxr-xr-x 2 root root 4096 Oct  9 16:25 .bin
                    drwxr-xr-x 6 root root 4096 Oct  9 16:25 handlebars
                    drwxr-xr-x 4 root root 4096 Oct  9 16:25 minimist
                    drwxr-xr-x 2 root root 4096 Oct  9 16:25 neo-async
                    drwxr-xr-x 4 root root 4096 Oct  9 16:25 source-map
                    drwxr-xr-x 5 root root 4096 Oct  9 16:25 uglify-js
                    drwxr-xr-x 4 root root 4096 Oct  9 16:25 wordwrap
                    root@XYZ:/app/data/modules#
                    
                    girishG Offline
                    girishG Offline
                    girish
                    Staff
                    wrote on last edited by
                    #14

                    @jeau I have fixed the package to support this. Please try https://docs.cloudron.io/apps/n8n/#custom-node-modules with the latest package 1.16.0

                    jeauJ rmdesR 2 Replies Last reply
                    1
                    • girishG girish

                      @jeau I have fixed the package to support this. Please try https://docs.cloudron.io/apps/n8n/#custom-node-modules with the latest package 1.16.0

                      jeauJ Offline
                      jeauJ Offline
                      jeau
                      App Dev
                      wrote on last edited by
                      #15

                      @girish great thank's, it works šŸ‘

                      S 1 Reply Last reply
                      1
                      • girishG girish

                        @jeau I have fixed the package to support this. Please try https://docs.cloudron.io/apps/n8n/#custom-node-modules with the latest package 1.16.0

                        rmdesR Offline
                        rmdesR Offline
                        rmdes
                        wrote on last edited by
                        #16

                        @girish Two questions:

                        Do I understand correctly that this is the only way to install external modules ?

                        Is there anything that need to be done (beside app restart) after adding the line in the env file?

                        girishG 1 Reply Last reply
                        0
                        • rmdesR rmdes

                          @girish Two questions:

                          Do I understand correctly that this is the only way to install external modules ?

                          Is there anything that need to be done (beside app restart) after adding the line in the env file?

                          girishG Offline
                          girishG Offline
                          girish
                          Staff
                          wrote on last edited by
                          #17

                          @rmdes right, if you want external modules, we have to fix the package. The modules are hardcoded in the Dockerfile.

                          1 Reply Last reply
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