14 lines
638 B
SQL
14 lines
638 B
SQL
-- Add ebook ratings functionality
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CREATE TABLE ebook_ratings (
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id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
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ebook_id UUID NOT NULL REFERENCES ebooks(id) ON DELETE CASCADE,
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user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
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rating INTEGER NOT NULL CHECK (rating >= 1 AND rating <= 5),
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created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
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updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
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UNIQUE(ebook_id, user_id)
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);
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-- Create indexes for better query performance
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CREATE INDEX idx_ebook_ratings_ebook_id ON ebook_ratings(ebook_id);
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CREATE INDEX idx_ebook_ratings_user_id ON ebook_ratings(user_id); |