migration added for index for fulltext tag search

backend/src/db/migrations/20200207080200-fulltext_index_for_tags.js

@@ -0,0 +1,49 @@
+import { getDriver } from '../../db/neo4j'
+
+export const description =
+  'This migration adds a fulltext index for the tags in order to search for Hasthags.'
+
+export async function up(next) {
+  const driver = getDriver()
+  const session = driver.session()
+  const transaction = session.beginTransaction()
+
+  try {
+    await transaction.run(`
+      CALL db.index.fulltext.createNodeIndex("tag_fulltext_search",["Tag"],["id"])
+    `)
+    await transaction.commit()
+    next()
+  } catch (error) {
+    // eslint-disable-next-line no-console
+    console.log(error)
+    await transaction.rollback()
+    // eslint-disable-next-line no-console
+    console.log('rolled back')
+  } finally {
+    session.close()
+  }
+}
+
+export async function down(next) {
+  const driver = getDriver()
+  const session = driver.session()
+  const transaction = session.beginTransaction()
+
+  try {
+    // Implement your migration here.
+    await transaction.run(`
+      CALL db.index.fulltext.drop("tag_fulltext_search")
+    `)
+    await transaction.commit()
+    next()
+  } catch (error) {
+    // eslint-disable-next-line no-console
+    console.log(error)
+    await transaction.rollback()
+    // eslint-disable-next-line no-console
+    console.log('rolled back')
+  } finally {
+    session.close()
+  }
+}