Set default value for v_dojoleads for legacy dojos pre-2017-SAD (#417)

Author: Wardormeur

scripts/database/pg/migrations/026.do.change-coalesce-v-dojolead.sql

@@ -0,0 +1,16 @@
+DO $$
+  BEGIN
+    CREATE OR REPLACE VIEW v_dojoleads AS (
+        SELECT lead.id, lead.email,
+        lead.completed,
+        lead.deleted, dojo.verified,
+        COALESCE(dojo.alpha2, (lead.application->'venue')->'country'->>'alpha2')::text as "alpha2",
+        COALESCE(dojo.id, (lead.application->'dojo')->>'id')::text as "dojo_id",
+        dojo.stage, dojo.name as "dojo_name", dojo.email as "dojo_email",
+        lead.updated_at, lead.created_at, dojo.verified_at, lead.completed_at
+        FROM cd_dojoleads as lead
+        LEFT JOIN cd_dojos as dojo
+        ON lead.id = dojo.dojo_lead_id
+      );
+  END;
+$$