Ensured latitude and longitude are set as float in DB

data/migrations/Version20200105165647.php

@@ -0,0 +1,52 @@
+<?php
+
+declare(strict_types=1);
+
+namespace ShlinkMigrations;
+
+use Doctrine\DBAL\DBALException;
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\DBAL\Types\Type;
+use Doctrine\DBAL\Types\Types;
+use Doctrine\Migrations\AbstractMigration;
+
+final class Version20200105165647 extends AbstractMigration
+{
+    private const COLUMNS = ['latitude', 'longitude'];
+
+    public function preUp(Schema $schema): void
+    {
+        foreach (self::COLUMNS as $columnName) {
+            $qb = $this->connection->createQueryBuilder();
+            $qb->update('visit_locations')
+               ->set($columnName, '"0"')
+               ->where($columnName . '=""')
+               ->orWhere($columnName . ' IS NULL')
+               ->execute();
+        }
+    }
+
+    /**
+     * @throws DBALException
+     */
+    public function up(Schema $schema): void
+    {
+        $visitLocations = $schema->getTable('visit_locations');
+
+        foreach (self::COLUMNS as $columnName) {
+            $visitLocations->getColumn($columnName)->setType(Type::getType(Types::FLOAT));
+        }
+    }
+
+    /**
+     * @throws DBALException
+     */
+    public function down(Schema $schema): void
+    {
+        $visitLocations = $schema->getTable('visit_locations');
+
+        foreach (self::COLUMNS as $columnName) {
+            $visitLocations->getColumn($columnName)->setType(Type::getType(Types::STRING));
+        }
+    }
+}