70 lines
2.1 KiB
Python
70 lines
2.1 KiB
Python
from app import db
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class Thread(db.Model):
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"""Some thread, such as a topic, program, tutorial."""
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__tablename__ = 'thread'
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# Unique ID
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id = db.Column(db.Integer, primary_key=True)
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# Top comment
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top_comment_id = db.Column(db.Integer, db.ForeignKey('comment.id'))
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top_comment = db.relationship('Comment', foreign_keys=top_comment_id)
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# Post owning the thread, set only by Topic, Program, etc. In general, you
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# should use [owner_post] which groups them together.
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owner_topic = db.relationship('Topic')
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owner_program = db.relationship('Program')
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# Other fields populated automatically through relations:
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# <comments> The list of comments (of type Comment)
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COMMENTS_PER_PAGE = 20
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def __init__(self):
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"""
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Create a empty Thread. Normally threads are not meant to be empty, so
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you should create a Comment with this thread as parent, then assign it
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as top comment with a call to set_top_comment().
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"""
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self.top_comment_id = None
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def set_top_comment(self, top_comment):
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"""
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Changes the top comment of the thread. The old top comment will usually
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become visible in the flow of posts instead of being pinned at the top.
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Arguments:
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top_comment -- new top comment, must belong to this thread
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"""
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if top_comment not in self.comments:
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raise Exception("Cannot set foreign comment as top thread comment")
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self.top_comment = top_comment
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@property
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def owner_post(self):
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if self.owner_topic != []:
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return self.owner_topic[0]
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if self.owner_program != []:
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return self.owner_program[0]
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return None
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def delete(self):
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"""Recursively delete thread and all associated contents."""
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# Remove reference to top comment
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self.top_comment = None
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db.session.add(self)
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db.session.commit()
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# Remove comments
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for c in self.comments:
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c.delete()
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# Remove thread
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db.session.commit()
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db.session.delete(self)
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def __repr__(self):
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return f'<Thread: #{self.id}>'
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