RelInvalidError - from_node and to_node must be node objects

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John Clegg

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Nov 11, 2014, 3:38:01 AM11/11/14
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Hi 

I'm getting "RelInvalidError - from_node and to_node must be node objects" when I'm trying to create a relationship. 


      foo = Dish.where("result.foo_id = #{foo_id}")

      bah = Patron.where("result.bah_id = #{bah_id}")

      rel = Rating.create(from_node: foo, to_node: bah, value: 1)

This give me an "RelInvalidError - from_node and to_node must be node objects" . I saw the error in the issues list but it looks like it has been fixed .

Using neo4j-core 3.0.3

Using neo4j 3.0.2

What am I doing wrong ?

John

Chris Grigg

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Nov 11, 2014, 12:15:35 PM11/11/14
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If you're doing exactly what you demonstrated, call `first` on both of those variables -- they return enumerables. Alternatively, use `find_by`.
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John Clegg

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Nov 11, 2014, 10:16:55 PM11/11/14
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Thanks.

I've changed the code to use find_by and now I get a different error

 `_rel_creation_query': undefined method `r' for nil:NilClass (NoMethodError)

I've tested the find_by and create relationship logic with the "Movie" demo data and it doesn't error. I need investigate more what is happen with my model / code . 

JC


On Wednesday, November 12, 2014 6:15:35 AM UTC+13, Chris Grigg wrote:
If you're doing exactly what you demonstrated, call `first` on both of those variables -- they return enumerables. Alternatively, use `find_by`.

On Tuesday, November 11, 2014, John Clegg <jo...@projectx.co.nz> wrote:
Hi 

I'm getting "RelInvalidError - from_node and to_node must be node objects" when I'm trying to create a relationship. 


      foo = Dish.where("result.foo_id = #{foo_id}")

      bah = Patron.where("result.bah_id = #{bah_id}")

      rel = Rating.create(from_node: foo, to_node: bah, value: 1)

This give me an "RelInvalidError - from_node and to_node must be node objects" . I saw the error in the issues list but it looks like it has been fixed .

Using neo4j-core 3.0.3

Using neo4j 3.0.2

What am I doing wrong ?

John

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Chris Grigg

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Nov 11, 2014, 11:26:06 PM11/11/14
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Good luck! Let us know if there's anything you want another set of eyes on.
To unsubscribe from this group and stop receiving emails from it, send an email to neo4jrb+u...@googlegroups.com.

John Clegg

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Nov 13, 2014, 2:48:40 AM11/13/14
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I managed to find out why I was having a problem. I had two problems:

1) I used "id" as id_property which had a conflict when creating a relationship

2) I hadn't created UUID's for my nodes. Which meant that when the create function was looking for neo_id it failed.

Now create is working like a charm !

Thanks to Chris for the extra help.

John
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