alter to text field

conf/migrations/0004_auto_20180501_0436.py

@@ -0,0 +1,35 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.3 on 2018-05-01 04:36
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('conf', '0003_judgeserver_is_disabled'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='judgeserver',
+            name='hostname',
+            field=models.TextField(),
+        ),
+        migrations.AlterField(
+            model_name='judgeserver',
+            name='ip',
+            field=models.TextField(null=True),
+        ),
+        migrations.AlterField(
+            model_name='judgeserver',
+            name='judger_version',
+            field=models.TextField(),
+        ),
+        migrations.AlterField(
+            model_name='judgeserver',
+            name='service_url',
+            field=models.TextField(null=True),
+        ),
+    ]

conf/models.py

@@ -3,16 +3,16 @@ from django.utils import timezone
 
 
 class JudgeServer(models.Model):
-    hostname = models.CharField(max_length=128)
-    ip = models.CharField(max_length=32, blank=True, null=True)
-    judger_version = models.CharField(max_length=32)
+    hostname = models.TextField()
+    ip = models.TextField(null=True)
+    judger_version = models.TextField()
     cpu_core = models.IntegerField()
     memory_usage = models.FloatField()
     cpu_usage = models.FloatField()
     last_heartbeat = models.DateTimeField()
     create_time = models.DateTimeField(auto_now_add=True)
     task_number = models.IntegerField(default=0)
-    service_url = models.CharField(max_length=256, blank=True, null=True)
+    service_url = models.TextField(null=True)
     is_disabled = models.BooleanField(default=False)
 
     @property