32 lines
1.4 KiB
MySQL
32 lines
1.4 KiB
MySQL
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-- 045_user_follows.sql
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-- User Follow Relationships (BE-DB-006: Create migration for user_follows table)
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-- Add table for user follow relationships
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-- === USER FOLLOWS ===
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-- Table for tracking user-to-user follow relationships
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CREATE TABLE IF NOT EXISTS public.follows (
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id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
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follower_id UUID NOT NULL REFERENCES public.users(id) ON DELETE CASCADE,
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followed_id UUID NOT NULL REFERENCES public.users(id) ON DELETE CASCADE,
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-- Timestamps
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created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
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updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
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-- Constraints
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CONSTRAINT uq_follows_follower_followed UNIQUE (follower_id, followed_id),
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CONSTRAINT chk_follows_not_self CHECK (follower_id != followed_id)
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);
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-- Indexes
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CREATE INDEX IF NOT EXISTS idx_follows_follower_id ON public.follows(follower_id);
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CREATE INDEX IF NOT EXISTS idx_follows_followed_id ON public.follows(followed_id);
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CREATE INDEX IF NOT EXISTS idx_follows_created_at_desc ON public.follows(created_at DESC);
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-- Comments
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COMMENT ON TABLE public.follows IS 'User-to-user follow relationships';
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COMMENT ON COLUMN public.follows.follower_id IS 'ID of the user who is following';
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COMMENT ON COLUMN public.follows.followed_id IS 'ID of the user being followed';
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COMMENT ON CONSTRAINT chk_follows_not_self ON public.follows IS 'Prevents users from following themselves';
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