56 lines
2.2 KiB
Python
56 lines
2.2 KiB
Python
"""Category model. Self-referential (parent_id) for subcategories.
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`field_schema` is admin-editable JSON describing category-specific listing
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fields. Shape:
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{
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"fields": [
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{"name":"condition","label":"Condition","type":"select",
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"required":true,"options":["new","like_new","good","fair"],"hot":true},
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{"name":"brand","label":"Brand","type":"text","required":false,"max":80},
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{"name":"salary_min","label":"Min salary","type":"number","required":false,"hot":true}
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]
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}
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Supported types: text, number, select, bool. `hot:true` marks a field whose
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value is denormalized onto an indexed Listing column for fast filtering.
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"""
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from datetime import datetime
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from sqlalchemy import JSON
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from app.extensions import db
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class Category(db.Model):
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__tablename__ = "categories"
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id = db.Column(db.BigInteger().with_variant(db.Integer, "sqlite"),
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primary_key=True, autoincrement=True)
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slug = db.Column(db.String(60), unique=True, nullable=False, index=True)
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name = db.Column(db.String(80), nullable=False)
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parent_id = db.Column(db.BigInteger().with_variant(db.Integer, "sqlite"),
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db.ForeignKey("categories.id"), nullable=True, index=True)
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field_schema = db.Column(JSON, nullable=False, default=dict)
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icon = db.Column(db.String(40), nullable=True)
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sort_order = db.Column(db.Integer, nullable=False, default=0)
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sponsor_id = db.Column(db.BigInteger, nullable=True) # FK wired in Phase 5
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is_active = db.Column(db.Boolean, nullable=False, default=True)
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created_at = db.Column(db.DateTime, default=datetime.utcnow, nullable=False)
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updated_at = db.Column(db.DateTime, default=datetime.utcnow,
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onupdate=datetime.utcnow, nullable=False)
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children = db.relationship("Category", backref=db.backref("parent",
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remote_side=[id]), lazy="selectin")
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listings = db.relationship("Listing", back_populates="category", lazy="dynamic")
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@property
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def is_subcategory(self):
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return self.parent_id is not None
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def fields(self):
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return (self.field_schema or {}).get("fields", [])
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def hot_fields(self):
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return [f for f in self.fields() if f.get("hot")]
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def __repr__(self):
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return f"<Category {self.slug}>"
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