kopia lustrzana https://dev.funkwhale.audio/funkwhale/funkwhale
53 wiersze
1.8 KiB
Python
53 wiersze
1.8 KiB
Python
import collections
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from django.contrib.contenttypes.models import ContentType
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from . import models
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def get_tags_from_foreign_key(
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ids, foreign_key_model, foreign_key_attr, tagged_items_attr="tagged_items"
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):
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"""
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Cf #988, this is useful to tag an artist with #Rock if all its tracks are tagged with
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#Rock, for instance.
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"""
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data = {}
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objs = foreign_key_model.objects.filter(
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**{f"{foreign_key_attr}__pk__in": ids}
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).order_by("-id")
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objs = objs.only("id", f"{foreign_key_attr}_id").prefetch_related(tagged_items_attr)
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for obj in objs.iterator():
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# loop on all objects, store the objs tags + counter on the corresponding foreign key
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row_data = data.setdefault(
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getattr(obj, f"{foreign_key_attr}_id"),
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{"total_objs": 0, "tags": []},
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)
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row_data["total_objs"] += 1
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for ti in getattr(obj, tagged_items_attr).all():
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row_data["tags"].append(ti.tag_id)
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# now, keep only tags that are present on all objects, i.e tags where the count
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# matches total_objs
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final_data = {}
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for key, row_data in data.items():
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counter = collections.Counter(row_data["tags"])
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tags_to_keep = sorted(
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[t for t, c in counter.items() if c >= row_data["total_objs"]]
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)
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if tags_to_keep:
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final_data[key] = tags_to_keep
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return final_data
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def add_tags_batch(data, model, tagged_items_attr="tagged_items"):
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model_ct = ContentType.objects.get_for_model(model)
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tagged_items = [
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models.TaggedItem(tag_id=tag_id, content_type=model_ct, object_id=obj_id)
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for obj_id, tag_ids in data.items()
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for tag_id in tag_ids
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]
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return models.TaggedItem.objects.bulk_create(tagged_items, batch_size=2000)
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