Unable to set up Parent Child with FOSElasticaBundle - symfony

Question

I am trying to setup a parent child relationship and I can't seem to get the mapping config right. I'm using Symfony2.5, FOSElastica 3.0.9 and Elasticsearch 1.4.4
Here is the relevent section from my mapping:
# fos elastica
fos_elastica:
clients:
default: { host: 127.0.0.1, port: 9200 }
serializer:
callback_class: FOS\ElasticaBundle\Serializer\Callback
serializer: serializer
indexes:
index:
index_name: index_%kernel.environment%
client: default
types:
company:
mappings:
id:
type: "long"
company_name:
type: "string"
fields:
raw:
type: "string"
index: "analyzed"
index_analyzer: "sortable"
persistence:
elastica_to_model_transformer:
ignore_missing: true
driver: orm # orm, mongodb, propel are available
model: Alpha\RMSBundle\Entity\Company
provider: ~
finder: ~
listener: ~
serializer:
groups: [company]
job:
mappings:
id:
type: "long"
company:
type: "object"
properties:
id:
type: "long"
_parent:
type: company
property: company
identifier: id
#_routing:
# required: true
# path: company
persistence:
elastica_to_model_transformer:
ignore_missing: true
driver: orm # orm, mongodb, propel are available
model: Alpha\RMSBundle\Entity\JobOpening
provider: ~
finder: ~
listener: ~
serializer:
groups: [job]
First I populate company, but when I try to populate job I get the following error:
[Elastica\Exception\ResponseException]
RoutingMissingException[routing is required for [index_v2]/[job]/[1]]
I have tried specifying the routing which is commented out above, but that didn't set the relationship either, I have taken the routing out as it is not mentioned in the docs.
Can anyone see where I am going wrong?

Answer 1

There is no problem with the mapping above, and _routing is not required. However FOSElastica will not populate the mapping with a _parent set.
However, as the docs says you need to to use setParent on the Document. In order to do this I need to setup a custom ModelToElasticaTransformer. This can be done by extending the ModelToElasticaAutoTransformer provided from the bundle in a class Alpha\RMSBundle\Transformer\JobToElasticaTransformer
In the transform() function I inserted a line:
$document->setParent($object->getCompany()->getId());
just above
return $document
Then you declare the service:
alpha.transformers.model.job:
class: Alpha\RMSBundle\Transformer\JobToElasticaTransformer
calls:
- [ setPropertyAccessor, ['#fos_elastica.property_accessor'] ]
Finally add the following in the mapping for the type in the persistence section:
model_to_elastica_transformer:
service: alpha.transformers.model.job
Now you can use populate as normal, as long as you remember to populate the parent class first

Answer 2

The bundle explains this very clearly in it's documentation
Note that to create a document with a parent, you need to call
setParent on the document rather than setting a _parent field. If you
do this wrong, you will see a RoutingMissingException as Elasticsearch
does not know where to store a document that should have a parent but
does not specify it.