85 lines
2.2 KiB
ReStructuredText
85 lines
2.2 KiB
ReStructuredText
***********
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Data models
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***********
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These immutable data models are used for all data transfer within the Mopidy
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backends and between the backends and the MPD frontend. All fields are optional
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and immutable. In other words, they can only be set through the class
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constructor during instance creation.
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If you want to modify a model, use the
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:meth:`~mopidy.models.ImmutableObject.replace` method. It accepts keyword
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arguments for the parts of the model you want to change, and copies the rest of
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the data from the model you call it on. Example::
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>>> from mopidy.models import Track
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>>> track1 = Track(name='Christmas Carol', length=171)
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>>> track1
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Track(artists=[], length=171, name='Christmas Carol')
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>>> track2 = track1.replace(length=37)
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>>> track2
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Track(artists=[], length=37, name='Christmas Carol')
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>>> track1
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Track(artists=[], length=171, name='Christmas Carol')
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Data model relations
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====================
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.. digraph:: model_relations
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Ref -> Album [ style="dotted", weight=1 ]
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Ref -> Artist [ style="dotted", weight=1 ]
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Ref -> Directory [ style="dotted", weight=1 ]
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Ref -> Playlist [ style="dotted", weight=1 ]
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Ref -> Track [ style="dotted", weight=1 ]
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Playlist -> Track [ label="has 0..n", weight=2 ]
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Track -> Album [ label="has 0..1", weight=10 ]
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Track -> Artist [ label="has 0..n", weight=10 ]
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Album -> Artist [ label="has 0..n", weight=10 ]
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Image
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SearchResult -> Artist [ label="has 0..n", weight=1 ]
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SearchResult -> Album [ label="has 0..n", weight=1 ]
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SearchResult -> Track [ label="has 0..n", weight=1 ]
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TlTrack -> Track [ label="has 1", weight=20 ]
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Data model API
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==============
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.. module:: mopidy.models
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:synopsis: Data model API
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.. autoclass:: mopidy.models.Ref
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.. autoclass:: mopidy.models.Track
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.. autoclass:: mopidy.models.Album
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.. autoclass:: mopidy.models.Artist
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.. autoclass:: mopidy.models.Playlist
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.. autoclass:: mopidy.models.Image
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.. autoclass:: mopidy.models.TlTrack
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.. autoclass:: mopidy.models.SearchResult
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Data model helpers
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==================
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.. autoclass:: mopidy.models.ImmutableObject
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:members:
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.. autoclass:: mopidy.models.Field
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.. autoclass:: mopidy.models.ModelJSONEncoder
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.. autofunction:: mopidy.models.model_json_decoder
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