slc loopback:relation throws error

[JordanMajd]

When I run the loopback relation command I get an error after I enter the property name for the relation.

The error:

/usr/local/lib/node_modules/strongloop/node_modules/rx/dist/rx.js:77
    throw e;
    ^
true

Here is a log of my terminal so you can see all the options I selected:

$ slc loopback:relation
(node:31096) fs: re-evaluating native module sources is not supported. If you are using the graceful-fs module, please update it to a more recent version.
? Select the model to create the relationship from: Sport
? Relation type: has one
? Choose a model to create a relationship with: PerformanceEvaluation
? Enter the property name for the relation: (performanceEvaluations)


/usr/local/lib/node_modules/strongloop/node_modules/rx/dist/rx.js:77
    throw e;
    ^
true

Any hints? Thanks!

And selection the model to create the relationship from:

[jannyHou]

@JordanMajd are you using node6?

[jannyHou]

@JordanMajd this is my console log of latest version of generator-loopback:

I am using node5. 5 and I don't see your error,

(node:31096) fs: re-evaluating native module sources is not supported. If you are using the graceful-fs module, please update it to a more recent version.

this warning is suspected, find some related issue : sequelize/cli#291
Can you try with node5 and see if the error still exists?

[JordanMajd]

Hey @jannyHou ,

I am using Node 6. Good call. I will try out a 5.* and see how it goes.

Thanks.

[nateha1984]

I'm seeing this same (or very similar) issue on 4.4.3. I do not get the first error:

(node:31096) fs: re-evaluating native module sources is not supported. If you are using the graceful-fs module, please update it to a more recent version.

But I do get the last error:

/usr/local/lib/node_modules/strongloop/node_modules/rx/dist/rx.js:77
throw e;
^
true

[jannyHou]

@nateha1984 could you fork https://github.com/strongloop/loopback-sandbox and upload your code?
I fail to reproduce it on my end...seems it's not as simple as you create a model in an app then just establish a relation. it might be caused by other config.

and please also include your generator-loopback, loopback version:) Thanks.

[nateha1984]

I've uploaded my changes to https://github.com/nateha1984/loopback-sandbox

I've been following the loopback-getting-started tutorial and run into the error on this page of the docs: https://docs.strongloop.com/display/public/LB/Define+model+relations

loopback version: 2.28.0
generator-loopback version: 1.20.6

[jannyHou]

@nateha1984 I git cloned your repo and followed tutorial on the doc page:
A coffee shop has many reviews

but it still works fine, did I miss anything or steps?

[nateha1984]

No, that's about it. I've tried running through another 3rd party tutorial as well and had the same issue.

[JordanMajd]

I haven't had a chance to retest with another version of Node, but do you think system could be a factor?

I'm on:

• OS X, El Capitan Version 10.11.4
• node v6.0.0
• [email protected]
  • [email protected]
  • [email protected]

[jannyHou]

@JordanMajd mine is windows. I am testing on mac now, need sometime to setup lol.

[nateha1984]

I'm also on OSX, same version

[jannyHou]

@JordanMajd @nateha1984 thank you I reproduced that error on osx.

[Arveti]

I am facing the same error on windows.
Any help to resolve to this will be much appreciated.
Thank you.

[jannyHou]

@Arveti good to know that it also happens on windows. could you post your system info(win7?8?10?) and strongloop & generator-loopback version? Thanks.

[JordanMajd]

Let me know if there is anything I can do to hlep @jannyHou

[Arveti]

@jannyHou It's windows 7. Npm version - 3.3.12, strongloop - 6.0.0, generator-loopback - 1.20.6

[mjordang]

Hello I have the same problem

C:\Users\mrjordan\AppData\Roaming\npm\node_modules\strongloop\node_modules\rx\dist\rx.js:77
throw e;
^
true

The running environment is: Windows7, I upgraded to [email protected] and these are the rest of versions:
{ 'loopback-server': '1.0.
npm: '3.8.9',
ares: '1.10.1-DEV',
http_parser: '2.5.2',
icu: '56.1',
modules: '46',
node: '4.4.4',
openssl: '1.0.2h',
uv: '1.8.0',
v8: '4.5.103.35',
zlib: '1.2.8' }

Could somebody help me with this issue?.

Regards.

[jannyHou]

I label it as a major issue, we will take a look at it as soon as possible. As a workaround, anyone run into this bug please check our doc https://docs.strongloop.com/display/public/LB/Tutorial%3A+model+relations
or example https://github.com/strongloop/loopback-example-relations
to manually add relations. Thanks for understanding.

[andmart]

Same issue here

Linux RHEL7.2
Node v4.4.3
strongloop v6.0.0 (node v4.4.3)
├── [email protected] (fb756f2)
├── [email protected] (8a73f8b)
├── [email protected] (cc2e089)
├── [email protected] (62e539b)
├── [email protected] (6ab604c)
├── [email protected] (f46e58f)
├── [email protected] (55d9a35)
├─┬ [email protected] (254835a)
│ └── [email protected] (ec2d95b)
├── [email protected] (c53788b)
├── [email protected]
└── [email protected]

? Select the model to create the relationship from: Grupo
? Relation type: has many
? Choose a model to create a relationship with: Tag
? Enter the property name for the relation: (tags)

node-v4.4.3-linux-x64/lib/node_modules/strongloop/node_modules/generator-loopback/node_modules/yeoman-generator/node_modules/yeoman-environment/node_modules/inquirer/node_modules/rx/dist/rx.js:77
throw e;
^
true

[andmart]

It seems something is missing here node-v4.4.3-linux-x64/lib/node_modules/strongloop/node_modules/generator-loopback/lib/helpers.js:

exports.checkRelationName = function (modelDefinition, name, callback) {

  modelDefinition.properties(function(err, list) {
    if (err) callback(err);
    var conflict = list.some(function(property) {
      return property.name === name;
    });
    if (conflict) {
      callback('Same property name already exists: ' + name);
    } else {
      callback(true);
    }

  });

conflict is always false and callback throws an error.

[jaredcasto]

@jannyHou - Same issue here...

Console log --
C:\Sites\temps\loopback-server>slc loopback:relation ? Select the model to create the relationship from: dishes ? Relation type: has many ? Choose a model to create a relationship with: Comments ? Enter the property name for the relation: (comments)

C:\Users\juguar\AppData\Roaming\npm\node_modules\strongloop\node_modules\generator-loopback\node_modules\yeoman-generator\node_modules\yeoman-environment\node_modules\inquirer\node_modules\rx\dist\rx.js:77 throw e; ^ true

package.json --
"dependencies": { "compression": "^1.0.3", "cors": "^2.5.2", "helmet": "^1.3.0", "loopback": "^2.22.0", "loopback-boot": "^2.6.5", "loopback-component-explorer": "^2.4.0", "loopback-connector-mongodb": "^1.15.1", "loopback-datasource-juggler": "^2.39.0", "serve-favicon": "^2.0.1" }

Windows 10, 64-bit
[email protected]

[toni783]

have the same issue

i am using:

strongloop v6.0.0 (node v4.4.4)
├── [email protected] (fb756f2)
├── [email protected] (a98f310)
├── [email protected] (9b29df0)
├── [email protected] (62e539b)
├── [email protected] (6ab604c)
├── [email protected] (f8c2339)
├── [email protected] (28c261d)
├─┬ [email protected]
│ └── [email protected] (ec2d95b)
├── [email protected] (c53788b)
├── [email protected]
└── [email protected]

with OS windows 8.1

hope you can fix this problem soon

[random0000]

Same issue here...Latest StrongLoop, both Node 4.4.4 and Node 6.1, Windows 10.

[nobesio]

Same issue here! OSX El Capitan

[denkan]

Here's what I did (os x):

1. npm install -g strongloop - update strongloop to v6.0.1 globally
2. npm install -g generator-loopback - install v1.20.7 globally
3. npm install -g yeoman-environment - install yeoman-environment v1.6.1 globally
4. rmdir -rf /usr/local/lib/node_modules/strongloop/node_modules/yeoman-environment - removed the local yeoman-environment dependency shipped with strongloop, forcing it to use the global v1.6.1.

[erickyi2006]

slc loopback:relation
? Select the model to create the relationship from: CoffeeShop
? Relation type: has many
? Choose a model to create a relationship with: Review
? Enter the property name for the relation: (reviews)

[object Promise]

After several attempts to update globally yeoman-environment, yeoman-generator, I found the fix. The culprit is in yeoman-environment inside yeoman-generator. Thanks for the hint by @jannyHou .Fixed by

1. updating the yeoman-environment version explictly in package.json
   strongloop\node_modules\generator-loopback\node_modules\yeoman-generator\package.json

"yeoman-environment": "1.6.1",

1. rerun npm install in the same folder

Thanks Janny

[gunjpan]

Related: #2392
Verification done for [object Promise] issue-fix by @ssh24. PTAL at verification comments.

[ssh24]

Verified.

Verification steps:

• Create a slc loopback app
• Create two models test1 and test2 using slc loopback:model
• Create a has many relationship between test1 and test2 using slc loopback:relation as shown below:

After that the test1.json file includes the following details as expected:

[subchal]

Hi good morning everyone

Are the fixes above are in npm registry? Are do we need to manually update package.jaon file for yeoman generator before doing npm install -g loopback-generator?

[jannyHou]

@subchal The fix hasn't released, it will be in npm registry tomorrow.
Please check workaround:
#2292 (comment)

[0candy]

Published as [email protected]

[maujee]

It looks like this has broken more of the generator now.
Creating a new model, I can no longer add properties.

See below where I've tried to create a new model "Contact" and add a property called "email".

`? Enter the model name: Contact
? Select the data-source to attach undefined to: db (memory)
? Select model's base class PersistedModel
? Expose Contact via the REST API? Yes
? Custom plural form (used to build REST URL):
? Common model or server only? common
Let's add some Contact properties now.

Enter an empty property name when done.
? Property name:
>> Name cannot contain special characters [object Object]email
`

[subchal]

Hi Good afternoon Maujee - Glad I didn't download the latest version :) I followed the trick another user posted here to update the package.json in the yeoman-generator

[jannyHou]

@0candy could you take a look of the new error of model generator:
#2292 (comment)

I am afraid the CI doesn't catch the error..
Related change: strongloop/generator-loopback@4a70425#diff-27a1c86133de4310373decfdad200a91R105
Thanks.

[baabuaravind]

I have the same error as like this, please do help to rectify it

Enter an empty property name when done.
? Property name:

Name cannot contain special characters [object Object]

[maujee]

The same thing happens with relations

? Select the model to create the relationship from: Organisation
? Relation type: has many
? Choose a model to create a relationship with: OrgUser
? Enter the property name for the relation: orgUsers
? Optionally enter a custom foreign key: 
>> Name cannot contain special characters [object Object]orgUserId

[jannyHou]

@maujee we are verifying the fix:
strongloop/generator-loopback@cfbdeda

I will update here after the fix published to npm registry.

[maujee]

@jannyHou Thanks for the update.

[jannyHou]

The error is fixed and published in [email protected]
strongloop/generator-loopback@f257078

Please reinstall your generator-loopback to get it work.

[jannyHou]

I am closing issue here since generator looks good now :)