custom fields: edtf and iso date support

[ppanero]

• closes EDTF CF #385

[ppanero]

Tested in an instance with the following config:

# Custom fields
from invenio_records_resources.services.custom_fields import EDTFDateStringCF, ISODateStringCF

RDM_CUSTOM_FIELDS = [
    EDTFDateStringCF(name="edtf"),
    ISODateStringCF(name="iso"),
]

RDM_CUSTOM_FIELDS_UI = [
    {
        "section": _("CERN Experiment"),
        "fields": [
            dict(
                field="edtf",  # this should be validated against the defined fields in `RDM_CUSTOM_FIELDS`
                ui_widget="Input",  # user defined widget in my-site
                props=dict(
                    label="EDTF Date",
                    placeholder="Type...",
                    icon="lab",
                    description="You should fill this...",
                )
            ),
            dict(
                field="iso",  # this should be validated against the defined fields in `RDM_CUSTOM_FIELDS`
                ui_widget="Input",  # user defined widget in my-site
                props=dict(
                    label="EDTF Date",
                    placeholder="Type...",
                    icon="lab",
                    description="You should fill this...",
                )
            ),
        ]
    }
]

Mapping result after services setup:

"custom_fields": {
    "properties": {
        "edtf": {
            "properties": {
                "date": {
                    "type": "date"
                },
                "date_range": {
                    "type": "date_range"
                }
            }
        },
        "iso": {
            "type": "date"
        }
    }
},

Demo records are indexed without them, same for a record without those values created from the deposit form.

"custom_fields": {},

Deposit form looks like:

The landing page:

The REST API (/api/records/12345):

"custom_fields": {"edtf": "2020/2021", "iso": "2020-10-01"},

The ES record:

"custom_fields": {
  "iso": "2020-10-01",
  "edtf": {
      "date": "2020/2021",
      "date_range": {
          "gte": "2020-01-01",
          "lte": "2021-12-31"
      }
  }
},

[ppanero]

Not sure why (recid is the same, so is not the parent), but on search a record passes twice by the dumper, the second time without metadata and custom_fields. That's why the first is a .get() instead of []

(Pdb) record.keys()
dict_keys(['parent', 'versions', 'has_draft', '$schema', 'pid', 'id', 'files', 'metadata', 'custom_fields', 'pids', 'access', 'uuid', 'version_id', 'created', 'updated'])
(Pdb) record.keys()
dict_keys(['id', 'pid', 'access', '$schema', 'communities', 'uuid', 'version_id', 'created', 'updated'])