[GeoNode-devel] GeoNode Backup and Restore ... any clue on DJango serialization?

[Alessio Fabiani]

Dear list,
working on the GeoNode Backup and Restore task I'm struggling with an issue
while trying to deserialize data.

Basically what I'm trying to do is dump the GeoNode fixtures as JSON files
and trying to load them later on an empty (prepared) GeoNode DB.

Now ... by playing a bit with the json outputs and load order I am able to
restore almost all the fixtures, but I have an issue with the Layers,
inherited from ResourceBases.

I am able to restore succesfully the ResourceBases but whenever I try to
deserialize a Layer I'm getting and error with the primary key.

Using the default JSON like this:

[
{
  "pk": 1,
  "model": "layers.layer",
  "fields": {
    "styles": [
      1
    ],
    "store": "datastore",
    "name": "san_andres_y_providencia_administrative",
    "service": null,
    "charset": "UTF-8",
    "title_en": "San Andres Y Providencia Administrative",
    "abstract_en": "No abstract provided",
    "regions": [],
    "typename": "geonode:san_andres_y_providencia_administrative",
    "default_style": null,
    "purpose_en": null,
    "workspace": "geonode",
    "upload_session": 9,
    "supplemental_information_en": "No information provided",
    "data_quality_statement_en": null,
    "storeType": "dataStore",
    "distribution_description_en": null,
    "constraints_other_en": null
  }
}
]

I get an error message like: null violates constraint for "resource_id"

If I try to modify the JSON like this:

[
{
  "*resourcebase_ptr_id*": 1,
  "model": "layers.layer",
  "fields": {
    "styles": [
      1
    ],
    "store": "datastore",
    "name": "san_andres_y_providencia_administrative",
    "service": null,
    "charset": "UTF-8",
    "title_en": "San Andres Y Providencia Administrative",
    "abstract_en": "No abstract provided",
    "regions": [],
    "typename": "geonode:san_andres_y_providencia_administrative",
    "default_style": null,
    "purpose_en": null,
    "workspace": "geonode",
    "upload_session": 9,
    "supplemental_information_en": "No information provided",
    "data_quality_statement_en": null,
    "storeType": "dataStore",
    "distribution_description_en": null,
    "constraints_other_en": null
  }
}
]

I get the following error:

ResourceBase matching query does not exist.

Any idea/help ?

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Ing. Alessio Fabiani
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