NoMethodError (undefined method `body=' for CypherNode 2093 (69983648512020):Neo4j::Server::CypherNode):

[djvs]

After:

 q = @res.questionbyid(params[:id])

[...]

 def questionbyid(id)
     self.query_as(:a).match('a-[r:aquestions]-n').where(n: {uuid: id}).pluck(:n).first
 end

[djvs]

Also a possibly related error (???) -

  TypeError (no implicit conversion of Symbol into Integer):
    app/models/resource.rb:968:in `block in as_json'
    app/models/resource.rb:968:in `map'
    app/models/resource.rb:968:in `as_json'

Possibly another class mismatch?

[subvertallchris]

You're getting a CypherNode because it's having trouble finding the mode
that's responsible for that combination of labels. Weird. If you call
:wrapper on the CypherNode, what does it return?

On Tuesday, August 25, 2015, djvs [email protected] wrote:

Also a possibly related error (???) -

TypeError (no implicit conversion of Symbol into Integer):
app/models/resource.rb:968:in block in as_json' app/models/resource.rb:968:inmap'
app/models/resource.rb:968:in `as_json'

Possibly another class mismatch?

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#943 (comment).

[djvs]

Might have been an error in my code (commas left over from a hash...) testing...

[djvs]

Hmm yes...so I guess if you define a model's attribute to be the model itself... or possibly some hash... it will cause that...

[subvertallchris]

Can you elaborate and give an example?

On Tuesday, August 25, 2015, djvs [email protected] wrote:

Hmm yes...so I guess if you define a model's attribute to be the model
itself... or possibly some hash... it will cause that...

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#943 (comment).

[djvs]

Well, I closed the file now, but it looked something like this:

q.explanation = params[:explanation],
q.version = 0,
q.answers = answers
q.save

This would mess something up, then the next time the whole Rails action was called (I think), it would give the CypherNode error. Removing the commas makes the problem vanish.

[djvs]

I take that back. It's still doing it.

[djvs]

puts q.wrapper.inspect gives:

 CypherNode 2170 (69979787324900)

Restarting the server resolves the bug...

[djvs]

Yes, the two bugs I reported are related. This:

obj[:questions] = self.questions.map{|x|puts x.inspect + " XXX"; x.as_json("teacher")}

Will give this:

CypherNode 2093 (70028474526840) XXX
Completed 500 Internal Server Error in 19ms

TypeError (no implicit conversion of Symbol into Integer):

[subvertallchris]

I just released 5.1.5 to fix this.

[subvertallchris]

You can reopen this issue and/or ping me on Gitter if you're still having trouble.