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Ajouter migrations/04_fk_policies.sql

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vdorge 2025-08-25 10:32:55 +00:00
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-- ==========================================================
-- 04_fk_policies.sql : normalisation des politiques ON DELETE
-- A exécuter après 01_init.sql et 03_checks.sql
-- ==========================================================
-- Helper: Drop FK d'une table/colonne si elle existe (par son/leurs noms de colonne)
-- puis recrée la contrainte avec la clause fournie
-- Utilise information_schema pour retrouver le nom de contrainte auto-généré
-- NB: schema = public
-- ========== messages.id_expediteur -> utilisateurs.id : SET NULL (au lieu de CASCADE)
DO $$
DECLARE
conname text;
BEGIN
SELECT tc.constraint_name INTO conname
FROM information_schema.table_constraints tc
JOIN information_schema.key_column_usage kcu
ON tc.constraint_name = kcu.constraint_name AND tc.table_schema = kcu.table_schema
WHERE tc.table_schema='public'
AND tc.table_name='messages'
AND tc.constraint_type='FOREIGN KEY'
AND kcu.column_name='id_expediteur';
IF conname IS NOT NULL THEN
EXECUTE format('ALTER TABLE public.messages DROP CONSTRAINT %I', conname);
END IF;
EXECUTE $sql$
ALTER TABLE public.messages
ADD CONSTRAINT fk_messages_id_expediteur
FOREIGN KEY (id_expediteur) REFERENCES public.utilisateurs(id) ON DELETE SET NULL
$sql$;
END $$;
-- ========== parents.id_co_parent -> utilisateurs.id : SET NULL
DO $$
DECLARE conname text;
BEGIN
SELECT tc.constraint_name INTO conname
FROM information_schema.table_constraints tc
JOIN information_schema.key_column_usage kcu
ON tc.constraint_name = kcu.constraint_name AND tc.table_schema = kcu.table_schema
WHERE tc.table_schema='public'
AND tc.table_name='parents'
AND tc.constraint_type='FOREIGN KEY'
AND kcu.column_name='id_co_parent';
IF conname IS NOT NULL THEN
EXECUTE format('ALTER TABLE public.parents DROP CONSTRAINT %I', conname);
END IF;
EXECUTE $sql$
ALTER TABLE public.parents
ADD CONSTRAINT fk_parents_id_co_parent
FOREIGN KEY (id_co_parent) REFERENCES public.utilisateurs(id) ON DELETE SET NULL
$sql$;
END $$;
-- ========== avenants_contrats.initie_par -> utilisateurs.id : SET NULL
DO $$
DECLARE conname text;
BEGIN
SELECT tc.constraint_name INTO conname
FROM information_schema.table_constraints tc
JOIN information_schema.key_column_usage kcu
ON tc.constraint_name = kcu.constraint_name AND tc.table_schema = kcu.table_schema
WHERE tc.table_schema='public'
AND tc.table_name='avenants_contrats'
AND tc.constraint_type='FOREIGN KEY'
AND kcu.column_name='initie_par';
IF conname IS NOT NULL THEN
EXECUTE format('ALTER TABLE public.avenants_contrats DROP CONSTRAINT %I', conname);
END IF;
EXECUTE $sql$
ALTER TABLE public.avenants_contrats
ADD CONSTRAINT fk_avenants_contrats_initie_par
FOREIGN KEY (initie_par) REFERENCES public.utilisateurs(id) ON DELETE SET NULL
$sql$;
END $$;
-- ========== evenements.id_am -> utilisateurs.id : SET NULL
DO $$
DECLARE conname text;
BEGIN
SELECT tc.constraint_name INTO conname
FROM information_schema.table_constraints tc
JOIN information_schema.key_column_usage kcu
ON tc.constraint_name = kcu.constraint_name AND tc.table_schema = kcu.table_schema
WHERE tc.table_schema='public'
AND tc.table_name='evenements'
AND tc.constraint_type='FOREIGN KEY'
AND kcu.column_name='id_am';
IF conname IS NOT NULL THEN
EXECUTE format('ALTER TABLE public.evenements DROP CONSTRAINT %I', conname);
END IF;
EXECUTE $sql$
ALTER TABLE public.evenements
ADD CONSTRAINT fk_evenements_id_am
FOREIGN KEY (id_am) REFERENCES public.utilisateurs(id) ON DELETE SET NULL
$sql$;
END $$;
-- ========== evenements.id_parent -> parents.id_utilisateur : SET NULL
DO $$
DECLARE conname text;
BEGIN
SELECT tc.constraint_name INTO conname
FROM information_schema.table_constraints tc
JOIN information_schema.key_column_usage kcu
ON tc.constraint_name = kcu.constraint_name AND tc.table_schema = kcu.table_schema
WHERE tc.table_schema='public'
AND tc.table_name='evenements'
AND tc.constraint_type='FOREIGN KEY'
AND kcu.column_name='id_parent';
IF conname IS NOT NULL THEN
EXECUTE format('ALTER TABLE public.evenements DROP CONSTRAINT %I', conname);
END IF;
EXECUTE $sql$
ALTER TABLE public.evenements
ADD CONSTRAINT fk_evenements_id_parent
FOREIGN KEY (id_parent) REFERENCES public.parents(id_utilisateur) ON DELETE SET NULL
$sql$;
END $$;
-- ========== evenements.cree_par -> utilisateurs.id : SET NULL
DO $$
DECLARE conname text;
BEGIN
SELECT tc.constraint_name INTO conname
FROM information_schema.table_constraints tc
JOIN information_schema.key_column_usage kcu
ON tc.constraint_name = kcu.constraint_name AND tc.table_schema = kcu.table_schema
WHERE tc.table_schema='public'
AND tc.table_name='evenements'
AND tc.constraint_type='FOREIGN KEY'
AND kcu.column_name='cree_par';
IF conname IS NOT NULL THEN
EXECUTE format('ALTER TABLE public.evenements DROP CONSTRAINT %I', conname);
END IF;
EXECUTE $sql$
ALTER TABLE public.evenements
ADD CONSTRAINT fk_evenements_cree_par
FOREIGN KEY (cree_par) REFERENCES public.utilisateurs(id) ON DELETE SET NULL
$sql$;
END $$;
-- ========== signalements_bugs.id_utilisateur -> utilisateurs.id : SET NULL
DO $$
DECLARE conname text;
BEGIN
SELECT tc.constraint_name INTO conname
FROM information_schema.table_constraints tc
JOIN information_schema.key_column_usage kcu
ON tc.constraint_name = kcu.constraint_name AND tc.table_schema = kcu.table_schema
WHERE tc.table_schema='public'
AND tc.table_name='signalements_bugs'
AND tc.constraint_type='FOREIGN KEY'
AND kcu.column_name='id_utilisateur';
IF conname IS NOT NULL THEN
EXECUTE format('ALTER TABLE public.signalements_bugs DROP CONSTRAINT %I', conname);
END IF;
EXECUTE $sql$
ALTER TABLE public.signalements_bugs
ADD CONSTRAINT fk_signalements_bugs_id_utilisateur
FOREIGN KEY (id_utilisateur) REFERENCES public.utilisateurs(id) ON DELETE SET NULL
$sql$;
END $$;
-- ========== validations.id_utilisateur -> utilisateurs.id : SET NULL
DO $$
DECLARE conname text;
BEGIN
SELECT tc.constraint_name INTO conname
FROM information_schema.table_constraints tc
JOIN information_schema.key_column_usage kcu
ON tc.constraint_name = kcu.constraint_name AND tc.table_schema = kcu.table_schema
WHERE tc.table_schema='public'
AND tc.table_name='validations'
AND tc.constraint_type='FOREIGN KEY'
AND kcu.column_name='id_utilisateur';
IF conname IS NOT NULL THEN
EXECUTE format('ALTER TABLE public.validations DROP CONSTRAINT %I', conname);
END IF;
EXECUTE $sql$
ALTER TABLE public.validations
ADD CONSTRAINT fk_validations_id_utilisateur
FOREIGN KEY (id_utilisateur) REFERENCES public.utilisateurs(id) ON DELETE SET NULL
$sql$;
END $$;
-- NB:
-- D'autres FK déjà correctes : CASCADE (assistantes_maternelles, parents, enfants_parents, dossiers, messages.id_dossier, contrats, avenants_contrats.id_contrat, evenements.id_enfant), SET NULL (uploads).
-- On laisse ON UPDATE par défaut (NO ACTION), car les UUID ne changent pas.