Observation Instance – Django REST framework

Get a list of Observation objects.

### Available end points:

- `/observations/` - Will list all Results in the database
- `/observations.json` - Will return all Results in json format. This can
also be achieved by using the accept header. `application/json`
- `/observations/<object_id>/` - Returns Results object with that id

### Available Methods:

- `GET`
- `HEAD`

### Available filters:

- `title`
- `uuid`
- `keywords`
- `status`
- `result_field`
- `discoveryKeywords`
- `updateFrequency`
- `nonGeographicFlag`
- `publicationState`
- `permissions`

### How to use filters:

These filters can be used like django query filters using __ for related model relationships.

- `/observations/?uuid=d594d53df2612bbd89c2e0e770b5c1a0`
- `/observations/?status=completed`
- `/observations/?results_field__dataPath__startswith=/neodc/esacci`
- `/observations/?discoveryKeywords__name=ESACCI`
- `/observations/?nonGeographicFlag=True`

Filters can be stacked to build an 'AND' relationship. E.g.

- `/observations/?publicationState__in=published,citable&nonGeographicFlag=True`
- `/observations/?publicationState__in=published,citable&discoveryKeyword__name=NDGO0003`

GET /api/v2/observations/28010/?format=api

HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 28010,
    "uuid": "cf22624d09af4402928742c352853ecf",
    "title": "HadGEM2-AO Historic Anthropogenic experiment model output for the agzkb run",
    "abstract": "These data were produced to contribute towards the EU ENSEMBLES project. The agzkb model run was a historic anthropogenic experiment. The boundary conditions of this experiment were as follows: Time-varying from 1859 to 2000, well-mixed greenhouse gases (GHGs), ozone emissions datasets, sulphate and carbonaceous aerosols, land surface/vegetation, constant volcanic stratospheric aerosols & Solar irradiance. These data are provided in the Met Office PP format, but tools are available to extract subsets in NetCDF and other formats.",
    "keywords": "",
    "publicationState": "published",
    "dataPublishedTime": "2021-10-18T09:26:09",
    "doiPublishedTime": null,
    "updateFrequency": "",
    "status": "completed",
    "result_field": {
        "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/28011/?format=api",
        "dataPath": "/badc/hadgem2ao/data/agzkb",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 152125856941,
        "numberOfFiles": 496,
        "fileFormat": "These data are provided in the Met Office PP format."
    },
    "timePeriod": "https://api.catalogue.ceda.ac.uk/api/v2/times/7528/?format=api",
    "geographicExtent": "https://api.catalogue.ceda.ac.uk/api/v2/bboxes/1/?format=api",
    "nonGeographicFlag": false,
    "phenomena": [
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/9833/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50653/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50654/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50656/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50657/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50658/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50659/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50660/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50661/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50662/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50663/?format=api",
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    ],
    "dataLineage": "Data provided by the UK Met Office Hadley Centre for archiving at the CEDA.",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
    "identifier_set": [],
    "projects": [
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    ],
    "observationcollection_set": [
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    ],
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