I've got a problem when I upload my project on Heroku. I've trying changing value of socket.io and MongoUrl, but I get this error:
Error: Missing required flag:
› -a, --app APP app to run command against
This has nothing to do with any of your files. It's an argument that you must provide to the Heroku CLI itself, e.g.
heroku config:set SOME_VARIABLE=some_value -a myapp
where myapp is the name of your Heroku app.
The -a / --app argument is required when heroku can't figure out what app to connect to, either bcause there is no Heroku remote configured or because there is more than one Heroku remote configured.
See also How to avoid the --app option with heroku CLI?
Related
I am new to Heroku and I keep getting the above error - everything looks good to go when I deploy in heroku, connect to my github repo etc.. but I keep getting this error.
Its a node/express app and works exactly as I'd like locally but it won't deploy. Any help would be appreciated.
For getting logs of particular heroku app, use:
heroku logs --app=app_name
For example: your app name is 'chatapp'
heroku logs -app=chatapp
just run the command with the --app flag, followed by the app name.
I like how the --app flag is "mandatory" according to the official documentation, but the lone usage example in the official documentation doesn't use the --app flag.
Anyway, it's not really mandatory. It's just implicit, usually. You have to tell Heroku which app you're using, with something like:
$ heroku git:remote -a your_app_name
and then it stops wondering which app to run these commands on.
you did not set git remote to your application, do that first by,
heroku git:remote -a your_app_name
To expand a little further on this (just for the benefit of other new users encountering a similar issue) - below is an example of a command you could enter in macOS Terminal:
heroku logs --tail --app yourexampleservername
If you have deployed yourexampleservername to Heroku, this should then display a log.
I have two git branches, staging and production, and I deployed them on Heroku in the same Heroku acccount. Suppose my app names are app1.heroku-app.com and app2.heroku-app.com and the remote names are heroku-staging and heroku-production,respectively. I deployed both apps on Heroku. After I login to Heroku from the console using heroku login and then try to access a Rails console using heroku run rails c, I get this message :
▸ multiple apps in git remotes
▸ remotes: heroku-staging heroku-production
How can I access a console?
If there's only one Heroku remote, heroku can infer which you want. When there are multiple (or if you want to access an application that doesn't have a remote in this Git repo, or when you're not in a Git repo at all), you need to use the --app option to specify which application you want a console on.
$ heroku --help
Usage: heroku COMMAND [--app APP] [command-specific-options]
$ heroku run rails c --app app1
$ heroku run rails c --app app2
In addition to being able to specify the app as a per-command flag, if you'd like for there to be a default environment, setting the environment variable HEROKU_APP to the app you want will make it so that heroku commands don't rely on git config.
$ heroku logs
› Error: Multiple apps in git remotes
...
$ export HEROKU_APP=app1
$ heroku logs
2018-12-31T03:56:34.888350+00:00 app[web.1]: 1.2.3.4 ...
Using the heroku docker:release command, how can I specify which app to release to? I can't see from any documentation whether there's any switch for this purpose.
Heroku commands take their context from the directory you are in when you run them.
Go into the directory from where you did heroku create then run heroku docker:release.
If you haven't used heroku create, then you can specify the app name with the --app <APP NAME> command line parameter. for instance, if you were to release to the app named f00 you would type:
heroku docker:release --app f00
How do you specify the app you want when you log in to Heroku from the command line?
I was trying to check the logs so when I first logged in I tried:
Heroku logs
this then told me:
! No app specified.
! Run this command from an app folder or specify which app to use with --app <app name>
I then tried:
heroku --app my-appname
but i get:
`--app` is not a heroku command.
I have tried all combinations.
You still need to include the command:
heroku logs --app app-name
You can also use -a instead of --app:
heroku logs -a app-name
Another option is to associate your (git) project to Heroku. From heroku open - no app specified:
$ cd app-dir
$ heroku git:remote -a app-name
$ heroku logs
Try this:
heroku git:remote -a [app_name]
This should allow you to call commands without having to specify which app you want them to be called on.
You could try adding --app app-name after you sentence.
Example: $ heroku domains:add your-domain --app app-name
Heroku CLI automatically detects the app name by scanning the git remotes for the current working copy.
If you're not in the app's local git clone, you need to specify the app name:
heroku logs --app app-name
or
heroku logs -a app-name
or by specifying the remote name:
heroku logs --remote production
You can reference this part of the Heroku documentation:
https://devcenter.heroku.com/articles/using-the-cli#app-commands
From my tests the Heroku CLI will infer the app from the current Git remote.
So to change to the "test" app:
git config heroku.remote test
And to come back to the default "heroku" application, which is probably your production app:
git config heroku.remote heroku
Not sure this is a good idea though...
For future solution seekers-
The error says a possible solution.
Run this command from an app folder
cd to the app directory root, then run your desired command.
Heroku's documentation on CLI says to do this (link):
If you have multiple heroku remotes or want to execute an app command outside of a local working copy, you can specify an explicit app name, domain, or git remote as follows:
$ heroku info --app myapp
$ heroku info --app www.example.com
$ heroku info --remote staging
However, I'm unable to get that second one to work. This is what I get:
$ heroku info --app foo
=== foo
[...]
$ heroku domains --app foo
Domain names for foo.herokuapp.com:
foo.example.com
$ heroku info --app foo.example.com
! Resource not found
At the very least, the documentation seems incorrect. But is it possible to reference an app by one of its custom domains another way?
Thanks!
Yep, I concur that - using the latest Heroku CLI all the methods work except using the domain name. Is there a particular reason why you want to use that way if the other ways work for you?