Migration updates

Squash version page migrations.
Add manual OCR and parsing migrations.
Fix tests.
Page search updates.

Signed-off-by: Roberto Rosario <roberto.rosario@mayan-edms.com>

mayan/apps/documents/migrations/0054_reset_document_pages.py

@@ -0,0 +1,62 @@
+from __future__ import unicode_literals
+
+from django.db import migrations
+
+
+def get_latest_version(document):
+    return document.versions.order_by('timestamp').last()
+
+
+def operation_reset_document_pages(apps, schema_editor):
+    Document = apps.get_model(app_label='documents', model_name='Document')
+    DocumentPage = apps.get_model(
+        app_label='documents', model_name='DocumentPage'
+    )
+
+    # Define inside the function to use the migration's apps instance
+    def pages_reset(document):
+        ContentType = apps.get_model('contenttypes', 'ContentType')
+        DocumentVersionPage = apps.get_model(
+            app_label='documents', model_name='DocumentVersionPage'
+        )
+
+        content_type = ContentType.objects.get_for_model(
+            model=DocumentVersionPage
+        )
+
+        for document_page in document.pages.all():
+            document_page.delete()
+
+        for version_page in get_latest_version(document=document).pages.all():
+            document_page = document.pages.create(
+                content_type=content_type,
+                page_number=version_page.page_number,
+                object_id=version_page.pk,
+            )
+
+    for document in Document.objects.using(schema_editor.connection.alias).all():
+        pages_reset(document=document)
+
+
+def operation_reset_document_pages_reverse(apps, schema_editor):
+    Document = apps.get_model(app_label='documents', model_name='Document')
+    DocumentPage = apps.get_model(
+        app_label='documents', model_name='DocumentPage'
+    )
+
+    for document in Document.objects.using(schema_editor.connection.alias).all():
+        for document_page in document.pages.all():
+            document_page.delete()
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('documents', '0053_create_document_page_and_result_models'),
+    ]
+
+    operations = [
+        migrations.RunPython(
+            code=operation_reset_document_pages,
+            reverse_code=operation_reset_document_pages_reverse
+        ),
+    ]