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2025-10-16 19:49:50 +00:00
parent ba6b4fef4f
commit c4097bc737
119 changed files with 3765 additions and 14390 deletions
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+// services/app/src/api/v1/routes/utils/schemaInspector.mjs
+// Utilidades para inspeccionar columnas, claves y relaciones en PostgreSQL.
+
+export async function loadColumns(client, table) {
+  const sql = `
+    SELECT
+      c.column_name,
+      c.data_type,
+      c.is_nullable = 'YES' AS is_nullable,
+      c.column_default,
+      (SELECT EXISTS (
+         SELECT 1 FROM pg_attribute a
+         JOIN pg_class t ON t.oid = a.attrelid
+         JOIN pg_index i ON i.indrelid = t.oid AND a.attnum = ANY(i.indkey)
+         WHERE t.relname = $1 AND i.indisprimary AND a.attname = c.column_name
+      )) AS is_primary,
+      (SELECT a.attgenerated = 's' OR a.attidentity IN ('a','d')
+       FROM pg_attribute a
+       JOIN pg_class t ON t.oid = a.attrelid
+       WHERE t.relname = $1 AND a.attname = c.column_name
+      ) AS is_identity
+    FROM information_schema.columns c
+    WHERE c.table_schema='public' AND c.table_name=$1
+    ORDER BY c.ordinal_position
+  `;
+  const { rows } = await client.query(sql, [table]);
+  return rows;
+}
+
+export async function loadForeignKeys(client, table) {
+  const sql = `
+    SELECT
+      kcu.column_name,
+      ccu.table_name AS foreign_table,
+      ccu.column_name AS foreign_column
+    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
+    JOIN information_schema.constraint_column_usage ccu
+      ON ccu.constraint_name = tc.constraint_name AND ccu.table_schema = tc.table_schema
+    WHERE tc.table_schema='public' AND tc.table_name=$1 AND tc.constraint_type='FOREIGN KEY'
+  `;
+  const { rows } = await client.query(sql, [table]);
+  const map = {};
+  for (const r of rows)
+    map[r.column_name] = { foreign_table: r.foreign_table, foreign_column: r.foreign_column };
+  return map;
+}
+
+export async function loadPrimaryKey(client, table) {
+  const sql = `
+    SELECT a.attname AS column_name
+    FROM pg_index i
+    JOIN pg_attribute a ON a.attrelid = i.indrelid AND a.attnum = ANY(i.indkey)
+    JOIN pg_class t ON t.oid = i.indrelid
+    WHERE t.relname = $1 AND i.indisprimary
+  `;
+  const { rows } = await client.query(sql, [table]);
+  return rows.map(r => r.column_name);
+}
+
+export async function pickLabelColumn(client, refTable) {
+  const preferred = ['nombre','raz_social','apodo','documento','correo','telefono'];
+  const { rows } = await client.query(
+    `SELECT column_name, data_type
+     FROM information_schema.columns
+     WHERE table_schema='public' AND table_name=$1
+     ORDER BY ordinal_position`, [refTable]
+  );
+  for (const cand of preferred)
+    if (rows.find(r => r.column_name === cand)) return cand;
+
+  const textish = rows.find(r => /text|character varying|varchar/i.test(r.data_type));
+  if (textish) return textish.column_name;
+  return rows[0]?.column_name || 'id';
+}