Add wagtail patch for partial search

Add a patch for wagtail.

This patch can be used to update wagtail after is has been installed
into a virtual environment.

patches/documents-and-images-support-partial-matches.patch

@@ -0,0 +1,75 @@
+From 1a1251cfb19cc49d94dfd71a8b84171916060c9b Mon Sep 17 00:00:00 2001
+From: Donald Buczek <buczek@molgen.mpg.de>
+Date: Fri, 15 Nov 2019 17:22:38 +0100
+Subject: [PATCH] documents/images: Support partial match on search
+
+The postgres_search backend currently doesn't support partial searches
+in its search() method. The index and the autocomplete method, however
+do.
+
+Enable partial matches for wagtails backend view and chooser by using
+.autocomplete instead of .search.
+
+This is a workaround and should be replaced by a cleaner approach.
+---
+ lib/python3.7/site-packages/wagtail/documents/views/chooser.py  | 2 +-
+ .../site-packages/wagtail/documents/views/documents.py          | 2 +-
+ lib/python3.7/site-packages/wagtail/images/views/chooser.py     | 2 +-
+ lib/python3.7/site-packages/wagtail/images/views/images.py      | 2 +-
+ 4 files changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/lib/python3.7/site-packages/wagtail/documents/views/chooser.py b/lib/python3.7/site-packages/wagtail/documents/views/chooser.py
+index f5d6331..a13378b 100644
+--- a/lib/python3.7/site-packages/wagtail/documents/views/chooser.py
++++ b/lib/python3.7/site-packages/wagtail/documents/views/chooser.py
+@@ -68,7 +68,7 @@ def chooser(request):
+         if searchform.is_valid():
+             q = searchform.cleaned_data['q']
+
+-            documents = documents.search(q)
++            documents = documents.autocomplete(q)
+             is_searching = True
+         else:
+             documents = documents.order_by('-created_at')
+diff --git a/lib/python3.7/site-packages/wagtail/documents/views/documents.py b/lib/python3.7/site-packages/wagtail/documents/views/documents.py
+index 36966e9..41ae754 100644
+--- a/lib/python3.7/site-packages/wagtail/documents/views/documents.py
++++ b/lib/python3.7/site-packages/wagtail/documents/views/documents.py
+@@ -51,7 +51,7 @@ def index(request):
+         form = SearchForm(request.GET, placeholder=_("Search documents"))
+         if form.is_valid():
+             query_string = form.cleaned_data['q']
+-            documents = documents.search(query_string)
++            documents = documents.autocomplete(query_string)
+     else:
+         form = SearchForm(placeholder=_("Search documents"))
+
+diff --git a/lib/python3.7/site-packages/wagtail/images/views/chooser.py b/lib/python3.7/site-packages/wagtail/images/views/chooser.py
+index cba82d8..c565385 100644
+--- a/lib/python3.7/site-packages/wagtail/images/views/chooser.py
++++ b/lib/python3.7/site-packages/wagtail/images/views/chooser.py
+@@ -94,7 +94,7 @@ def chooser(request):
+         if searchform.is_valid():
+             q = searchform.cleaned_data['q']
+
+-            images = images.search(q)
++            images = images.autocomplete(q)
+             is_searching = True
+         else:
+             is_searching = False
+diff --git a/lib/python3.7/site-packages/wagtail/images/views/images.py b/lib/python3.7/site-packages/wagtail/images/views/images.py
+index a42958b..ed388f9 100644
+--- a/lib/python3.7/site-packages/wagtail/images/views/images.py
++++ b/lib/python3.7/site-packages/wagtail/images/views/images.py
+@@ -40,7 +40,7 @@ def index(request):
+         if form.is_valid():
+             query_string = form.cleaned_data['q']
+
+-            images = images.search(query_string)
++            images = images.autocomplete(query_string)
+     else:
+         form = SearchForm(placeholder=_("Search images"))
+
+-- 
+2.22.0
+