mirror of
https://codeberg.org/likwid/likwid.git
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Marco Allegretti
910a6465f2
- Backend: Rust/Axum with PostgreSQL, plugin architecture - Frontend: Astro with polished UI - Voting methods: Approval, Ranked Choice, Schulze, STAR, Quadratic - Features: Liquid delegation, transparent moderation, structured deliberation - Documentation: User and admin guides in /docs - Deployment: Docker/Podman compose files for production and demo - Demo: Seeded data with 3 communities, 13 users, 7 proposals License: AGPLv3
116 lines
4.9 KiB
SQL
116 lines
4.9 KiB
SQL
-- Advanced Voting Methods
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-- Implements Schulze, STAR, Quadratic, and Ranked Choice voting
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-- Voting method enum (extend existing)
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DO $$
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BEGIN
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-- Add new voting methods if they don't exist
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ALTER TYPE proposal_status ADD VALUE IF NOT EXISTS 'calculating';
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EXCEPTION
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WHEN duplicate_object THEN null;
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END $$;
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-- Ranked ballots for Schulze/Ranked Choice
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CREATE TABLE ranked_ballots (
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id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
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proposal_id UUID NOT NULL REFERENCES proposals(id) ON DELETE CASCADE,
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voter_id UUID NOT NULL REFERENCES voting_identities(id),
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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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UNIQUE(proposal_id, voter_id)
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);
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-- Individual rankings within a ballot
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CREATE TABLE ranked_ballot_entries (
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id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
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ballot_id UUID NOT NULL REFERENCES ranked_ballots(id) ON DELETE CASCADE,
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option_id UUID NOT NULL REFERENCES proposal_options(id) ON DELETE CASCADE,
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rank INT NOT NULL, -- 1 = first choice, 2 = second, etc.
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UNIQUE(ballot_id, option_id),
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UNIQUE(ballot_id, rank)
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);
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-- Score ballots for STAR voting
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CREATE TABLE score_ballots (
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id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
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proposal_id UUID NOT NULL REFERENCES proposals(id) ON DELETE CASCADE,
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voter_id UUID NOT NULL REFERENCES voting_identities(id),
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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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UNIQUE(proposal_id, voter_id)
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);
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-- Individual scores within a ballot (0-5 scale)
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CREATE TABLE score_ballot_entries (
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id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
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ballot_id UUID NOT NULL REFERENCES score_ballots(id) ON DELETE CASCADE,
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option_id UUID NOT NULL REFERENCES proposal_options(id) ON DELETE CASCADE,
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score INT NOT NULL CHECK (score >= 0 AND score <= 5),
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UNIQUE(ballot_id, option_id)
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);
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-- Quadratic voting credits and allocations
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CREATE TABLE quadratic_budgets (
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id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
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proposal_id UUID NOT NULL REFERENCES proposals(id) ON DELETE CASCADE,
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voter_id UUID NOT NULL REFERENCES voting_identities(id),
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total_credits INT NOT NULL DEFAULT 100,
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used_credits INT NOT NULL DEFAULT 0,
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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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UNIQUE(proposal_id, voter_id)
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);
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-- Quadratic vote allocations
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CREATE TABLE quadratic_allocations (
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id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
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budget_id UUID NOT NULL REFERENCES quadratic_budgets(id) ON DELETE CASCADE,
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option_id UUID NOT NULL REFERENCES proposal_options(id) ON DELETE CASCADE,
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votes INT NOT NULL DEFAULT 0, -- Actual votes (cost = votes^2)
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UNIQUE(budget_id, option_id)
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);
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-- Voting results cache (for complex calculations)
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CREATE TABLE voting_results (
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id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
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proposal_id UUID NOT NULL REFERENCES proposals(id) ON DELETE CASCADE,
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voting_method VARCHAR(50) NOT NULL,
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winner_option_id UUID REFERENCES proposal_options(id),
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results_json JSONB NOT NULL, -- Full results including rankings, scores, etc.
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calculated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
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UNIQUE(proposal_id)
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);
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-- Pairwise comparison matrix (for Schulze)
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CREATE TABLE pairwise_matrix (
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id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
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proposal_id UUID NOT NULL REFERENCES proposals(id) ON DELETE CASCADE,
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option_a_id UUID NOT NULL REFERENCES proposal_options(id) ON DELETE CASCADE,
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option_b_id UUID NOT NULL REFERENCES proposal_options(id) ON DELETE CASCADE,
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a_over_b INT NOT NULL DEFAULT 0, -- Number of voters who prefer A over B
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UNIQUE(proposal_id, option_a_id, option_b_id)
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);
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-- Add voting method configuration to proposals
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ALTER TABLE proposals ADD COLUMN IF NOT EXISTS voting_config JSONB DEFAULT '{}';
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ALTER TABLE proposals ADD COLUMN IF NOT EXISTS quadratic_credit_budget INT DEFAULT 100;
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-- Indexes
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CREATE INDEX idx_ranked_ballots_proposal ON ranked_ballots(proposal_id);
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CREATE INDEX idx_ranked_ballot_entries_ballot ON ranked_ballot_entries(ballot_id);
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CREATE INDEX idx_score_ballots_proposal ON score_ballots(proposal_id);
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CREATE INDEX idx_score_ballot_entries_ballot ON score_ballot_entries(ballot_id);
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CREATE INDEX idx_quadratic_budgets_proposal ON quadratic_budgets(proposal_id);
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CREATE INDEX idx_quadratic_allocations_budget ON quadratic_allocations(budget_id);
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CREATE INDEX idx_voting_results_proposal ON voting_results(proposal_id);
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CREATE INDEX idx_pairwise_matrix_proposal ON pairwise_matrix(proposal_id);
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-- Triggers
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CREATE TRIGGER ranked_ballots_updated_at BEFORE UPDATE ON ranked_ballots
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FOR EACH ROW EXECUTE FUNCTION update_updated_at();
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CREATE TRIGGER score_ballots_updated_at BEFORE UPDATE ON score_ballots
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FOR EACH ROW EXECUTE FUNCTION update_updated_at();
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CREATE TRIGGER quadratic_budgets_updated_at BEFORE UPDATE ON quadratic_budgets
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FOR EACH ROW EXECUTE FUNCTION update_updated_at();
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