Bug 1182464 - Make the failure_line signature a TextField.

I also removed a limit on the length of `message` because it didn't make sense.

treeherder/model/migrations/0001_initial.py

@@ -104,8 +104,8 @@ class Migration(migrations.Migration):
                 ('subtest', models.TextField(null=True, blank=True)),
                 ('status', models.CharField(max_length=7, choices=[('PASS', 'PASS'), ('FAIL', 'FAIL'), ('OK', 'OK'), ('ERROR', 'ERROR'), ('TIMEOUT', 'TIMEOUT'), ('CRASH', 'CRASH'), ('ASSERT', 'ASSERT'), ('SKIP', 'SKIP'), ('NOTRUN', 'NOTRUN')])),
                 ('expected', models.CharField(blank=True, max_length=7, null=True, choices=[('PASS', 'PASS'), ('FAIL', 'FAIL'), ('OK', 'OK'), ('ERROR', 'ERROR'), ('TIMEOUT', 'TIMEOUT'), ('CRASH', 'CRASH'), ('ASSERT', 'ASSERT'), ('SKIP', 'SKIP'), ('NOTRUN', 'NOTRUN')])),
-                ('message', models.TextField(max_length=255, null=True, blank=True)),
-                ('signature', models.CharField(max_length=255, null=True, blank=True)),
+                ('message', models.TextField(null=True, blank=True)),
+                ('signature', models.TextField(null=True, blank=True)),
                 ('level', models.CharField(blank=True, max_length=8, null=True, choices=[('PASS', 'PASS'), ('FAIL', 'FAIL'), ('OK', 'OK'), ('ERROR', 'ERROR'), ('TIMEOUT', 'TIMEOUT'), ('CRASH', 'CRASH'), ('ASSERT', 'ASSERT'), ('SKIP', 'SKIP'), ('NOTRUN', 'NOTRUN')])),
                 ('stack', models.TextField(null=True, blank=True)),
                 ('stackwalk_stdout', models.TextField(null=True, blank=True)),

treeherder/model/models.py

@@ -549,8 +549,8 @@ class FailureLine(models.Model):
     subtest = models.TextField(blank=True, null=True)
     status = models.CharField(max_length=7, choices=STATUS_CHOICES)
     expected = models.CharField(max_length=7, choices=STATUS_CHOICES, blank=True, null=True)
-    message = models.TextField(max_length=255, blank=True, null=True)
-    signature = models.CharField(max_length=255, blank=True, null=True)
+    message = models.TextField(blank=True, null=True)
+    signature = models.TextField(blank=True, null=True)
     level = models.CharField(max_length=8, choices=STATUS_CHOICES, blank=True, null=True)
     stack = models.TextField(blank=True, null=True)
     stackwalk_stdout = models.TextField(blank=True, null=True)

treeherder/model/sql/template_schema/treeherder_reference_1.sql.tmpl

@@ -688,7 +688,7 @@ DROP TABLE IF EXISTS `failure_line`;
      `status` varchar(7) NOT NULL,
      `expected` varchar(7) NULL,
      `message` longtext NULL,
-     `signature` varchar(255) NULL,
+     `signature` longtext NULL,
      `level` varchar(8) NULL,
      `stack` longtext NULL,
      `stackwalk_stdout` longtext NULL,