db migration for filters

migrations/20181119183500_add_filters_to_targeturl.js

@@ -0,0 +1,18 @@
+exports.up = function (knex, Promise) {
+  return Promise.all([
+    knex.schema.table('targeturl', t => {
+      t.string('title')
+      t.string('author')
+      t.string('publisher')
+      t.string('isbn')
+    })
+  ])
+}
+
+exports.down = function (knex, Promise) {
+  return Promise.all([
+    knex.schema.table('targeturl', t => {
+      t.dropColumns('title', 'author', 'publisher', 'isbn')
+    })
+  ])
+}