Add support for SQL Server database

Dockerfile

@@ -5,6 +5,8 @@ ARG NODE_VERSION="8.x"
 RUN curl -sL "https://deb.nodesource.com/setup_${NODE_VERSION}" | bash - \
  && apt-get install nodejs
 
+RUN apt-get install -y unixodbc-dev
+
 COPY app/server/static/package*.json /doccano/app/server/static/
 RUN cd /doccano/app/server/static \
  && npm ci
@@ -29,6 +31,15 @@ RUN cd /doccano \
 
 FROM python:${PYTHON_VERSION}-slim-stretch AS runtime
 
+RUN apt-get update \
+ && apt-get install -y curl gnupg apt-transport-https \
+ && curl -fsS https://packages.microsoft.com/keys/microsoft.asc | apt-key add - \
+ && curl -fsS https://packages.microsoft.com/config/debian/9/prod.list > /etc/apt/sources.list.d/mssql.list \
+ && apt-get update \
+ && ACCEPT_EULA=Y apt-get install -y msodbcsql17 mssql-tools \
+ && apt-get remove -y curl gnupg apt-transport-https \
+ && rm -rf /var/lib/apt/lists/*
+
 RUN useradd -ms /bin/sh doccano
 
 COPY --from=builder /deps /deps

app/api/migrations/0001_initial.py

@@ -161,10 +161,6 @@ class Migration(migrations.Migration):
             name='sequenceannotation',
             unique_together={('document', 'user', 'label', 'start_offset', 'end_offset')},
         ),
-        migrations.AlterUniqueTogether(
-            name='seq2seqannotation',
-            unique_together={('document', 'user', 'text')},
-        ),
         migrations.AlterUniqueTogether(
             name='label',
             unique_together={('project', 'text'), ('project', 'prefix_key', 'suffix_key')},

app/api/migrations/0003_support_sql_server.py

@@ -0,0 +1,24 @@
+# Generated by Django 2.1.7 on 2019-06-26 13:20
+
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ('api', '0002_approve_document_labels'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='seq2seqannotation',
+            name='text',
+            field=models.CharField(max_length=500),
+        ),
+        migrations.AlterUniqueTogether(
+            name='seq2seqannotation',
+            unique_together={('document', 'user', 'text')},
+        ),
+    ]

app/api/models.py

@@ -226,7 +226,7 @@ class SequenceAnnotation(Annotation):
 
 class Seq2seqAnnotation(Annotation):
     document = models.ForeignKey(Document, related_name='seq2seq_annotations', on_delete=models.CASCADE)
-    text = models.TextField()
+    text = models.CharField(max_length=500)
 
     class Meta:
         unique_together = ('document', 'user', 'text')

app/app/settings.py

@@ -254,6 +254,11 @@ DATABASES['default'].update(dj_database_url.config(
 if DATABASES['default'].get('ENGINE') == 'django.db.backends.sqlite3':
     DATABASES['default'].get('OPTIONS', {}).pop('sslmode', None)
 
+# default to a sensible modern driver for Azure SQL
+if DATABASES['default'].get('ENGINE') == 'sql_server.pyodbc':
+    db_options = DATABASES['default'].setdefault('OPTIONS', {})\
+        .setdefault('driver', 'ODBC Driver 17 for SQL Server')
+
 # Honor the 'X-Forwarded-Proto' header for request.is_secure()
 SECURE_PROXY_SSL_HEADER = ('HTTP_X_FORWARDED_PROTO', 'https')
 

requirements.txt

@@ -9,6 +9,7 @@ django-heroku==0.3.1
 django-webpack-loader==0.6.0
 django-widget-tweaks==1.4.2
 django-polymorphic==2.0.3
+django-pyodbc-azure==2.1.0.0
 django-rest-polymorphic==0.1.8
 djangorestframework==3.8.2
 djangorestframework-csv==2.1.0