define biplot json as TextField to avoid max_length pg problems

Former-commit-id: d0a059132b70a76919992b0c8aafbe2e5cd3ffd5

ippisite/db.sqlite3.REMOVED.git-id

-f4615307b7cf5e24f19b31b18853c259b610a4a6
+3c03e4dd1b0b5391fa56e19cb7c4c3740ce690cd
\ No newline at end of file

ippisite/ippidb/migrations/0002_auto_20180725_1805.py

+# -*- coding: utf-8 -*-
+# Generated by Django 1.11 on 2018-07-25 18:05
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('ippidb', '0001_squashed_0035_auto_20180725_1347'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='lellebiplotdata',
+            name='le_lle_biplot_data',
+            field=models.TextField(blank=True, null=True, verbose_name='LE-LLE biplot JSON data'),
+        ),
+        migrations.AlterField(
+            model_name='pcabiplotdata',
+            name='pca_biplot_data',
+            field=models.TextField(blank=True, null=True, verbose_name='PCA biplot JSON data'),
+        ),
+    ]

ippisite/ippidb/models.py

@@ -497,13 +497,13 @@ class Compound(models.Model):
 
 
 class PcaBiplotData(models.Model):
-    pca_biplot_data = models.CharField(
-        'PCA biplot JSON data', max_length=150000, blank=True, null=True)
+    pca_biplot_data = models.TextField(
+        'PCA biplot JSON data', blank=True, null=True)
 
 
 class LeLleBiplotData(models.Model):
-    le_lle_biplot_data = models.CharField(
-        'LE-LLE biplot JSON data', max_length=150000, blank=True, null=True)
+    le_lle_biplot_data = models.TextField(
+        'LE-LLE biplot JSON data', blank=True, null=True)
 
 
 class MDDRActivityClass(models.Model):