feat(employment): add last_active_at column with PostgreSQL trigger

app/data_access/employment.py

@@ -34,6 +34,7 @@ class Meta:
             "should_force_nb_worker_info",
             "should_see_certificate_info",
             "is_acknowledged",
+            "last_active_at",
         )
 
     id = graphene.Field(
@@ -107,6 +108,11 @@ class Meta:
         graphene.Boolean,
         description="Indique si l'on doit forcer la demande des informations liées au nombre de chauffeurs pour ce rattachement",
     )
+    last_active_at = graphene.Field(
+        TimeStamp,
+        required=False,
+        description="Horodatage de la dernière activité du salarié",
+    )
 
     @with_authorization_policy(
         only_self_employment,

app/models/employment.py

@@ -53,6 +53,8 @@ class Employment(UserEventBaseModel, Dismissable, HasBusiness):
     )
     team = db.relationship(Team, backref="employments")
 
+    last_active_at = db.Column(db.DateTime, index=True, nullable=True)
+
     # Needed for anonymization process if the submitter is still linked to an active user
     @declared_attr
     def submitter_id(cls):

migrations/versions/de1be8351df4_add_mission_trigger_to_populate_last_.py

@@ -0,0 +1,63 @@
+"""add_mission_trigger_to_populate_last_active_at_in_employment
+
+Revision ID: de1be8351df4
+Revises: 1c6085670a9f
+Create Date: 2025-12-16 23:22:14.012041
+
+"""
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = "de1be8351df4"
+down_revision = "1c6085670a9f"
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column(
+        "employment",
+        sa.Column("last_active_at", sa.DateTime(), nullable=True, index=True),
+    )
+    op.execute(
+        """
+    CREATE OR REPLACE FUNCTION insert_last_active_at()
+    RETURNS TRIGGER AS $$
+    BEGIN
+        UPDATE employment e
+        SET last_active_at = m.creation_time
+        FROM mission m
+        WHERE m.id = NEW.mission_id
+        AND e.user_id = NEW.user_id
+        AND e.validation_status = 'approved'
+        AND e.company_id = m.company_id
+        AND e.end_date IS NULL
+        AND e.dismissed_at IS NULL
+        AND (e.last_active_at < m.creation_time OR e.last_active_at IS NULL);
+        RETURN NEW;
+    END;
+    $$ LANGUAGE plpgsql;
+
+    CREATE TRIGGER after_insert_mission_end
+    AFTER INSERT ON mission_end
+    FOR EACH ROW
+    EXECUTE FUNCTION insert_last_active_at();
+    """
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.execute(
+        """
+    DROP TRIGGER IF EXISTS after_insert_mission_end ON mission_end;
+    DROP FUNCTION IF EXISTS insert_last_active_at();
+    """
+    )
+    op.drop_column("employment", "last_active_at")
+    # ### end Alembic commands ###