diff --git a/apps/assets/backends/base.py b/apps/assets/backends/base.py
index d46c67f70..9c9f7ca1e 100644
--- a/apps/assets/backends/base.py
+++ b/apps/assets/backends/base.py
@@ -43,7 +43,7 @@ class AssetUserQuerySet(list):
             else:
                 in_kwargs[k] = v
         for k in in_kwargs:
-            kwargs.pop(k)
+            kwargs.pop(k, None)
 
         if len(in_kwargs) == 0:
             return self
@@ -56,7 +56,7 @@ class AssetUserQuerySet(list):
                     v = [str(i) for i in v]
                 if isinstance(attr, uuid.UUID):
                     attr = str(attr)
-                if v in attr:
+                if attr in v:
                     matched = True
             if matched:
                 queryset.append(i)
@@ -68,11 +68,12 @@ class AssetUserQuerySet(list):
             real = []
             for k, v in kwargs.items():
                 wanted.append(v)
-                value = getattr(obj, k)
+                value = getattr(obj, k, None)
                 if isinstance(value, uuid.UUID):
                     value = str(value)
                 real.append(value)
             return wanted == real
+        kwargs = {k: v for k, v in kwargs.items() if k.find('__in') == -1}
         if len(kwargs) > 0:
             queryset = AssetUserQuerySet([i for i in self if filter_it(i)])
         else:
diff --git a/apps/assets/templates/assets/_asset_update_modal.html b/apps/assets/templates/assets/_asset_update_modal.html
deleted file mode 100644
index 68b2ff8db..000000000
--- a/apps/assets/templates/assets/_asset_update_modal.html
+++ /dev/null
@@ -1,4 +0,0 @@
-{% extends '_update_modal.html' %}
-{% load i18n %}
-
-{% block modal_title%}{% trans "Update assets" %}{% endblock %}
diff --git a/apps/templates/_import_modal.html b/apps/templates/_import_modal.html
deleted file mode 100644
index 9211bdcb9..000000000
--- a/apps/templates/_import_modal.html
+++ /dev/null
@@ -1,28 +0,0 @@
-{% extends '_modal.html' %}
-{% load i18n %}
-
-{% block modal_id %}import_modal{% endblock %}
-
-{% block modal_confirm_id %}btn_import_confirm{% endblock %}
-
-{% block modal_body %}
-    <form method="post" id="fm_import">
-        {% csrf_token %}
-        <div class="form-group">
-            <label class="control-label">{% trans "Download the imported template or use the exported CSV file format" %}</label>
-            <a href="{% block import_modal_download_template_url %}{% endblock %}?format=csv&template=import&limit=1" style="display: block">{% trans 'Download the import template' %}</a>
-        </div>
-
-        <div class="form-group">
-            <label class="control-label" for="id_file">{% trans "Select the CSV file to import" %}</label>
-            <input id="id_file" type="file" name="file" />
-        </div>
-    </form>
-
-    <div>
-        <p class="text-success" id="success_created"></p>
-        <p id="success_created_detail"></p>
-        <p class="text-danger" id="created_failed"></p>
-        <p id="created_failed_detail"></p>
-    </div>
-{% endblock %}
diff --git a/apps/templates/_update_modal.html b/apps/templates/_update_modal.html
deleted file mode 100644
index db2b14110..000000000
--- a/apps/templates/_update_modal.html
+++ /dev/null
@@ -1,28 +0,0 @@
-{% extends '_modal.html' %}
-{% load i18n %}
-
-{% block modal_id %}update_modal{% endblock %}
-
-{% block modal_confirm_id %}btn_update_confirm{% endblock %}
-
-{% block modal_body %}
-    <form method="post" id="fm_import">
-        {% csrf_token %}
-        <div class="form-group">
-            <label class="control-label">{% trans "Download the update template or use the exported CSV file format" %}</label>
-            <a id="download_update_template" style="display: block">{% trans 'Download the update template' %}</a>
-        </div>
-
-        <div class="form-group">
-            <label class="control-label" for="update_file">{% trans "Select the CSV file to import" %}</label>
-            <input id="update_file" type="file" name="file" />
-        </div>
-    </form>
-
-    <div>
-        <p class="text-warning" id="success_updated"></p>
-        <p id="success_updated_detail"></p>
-        <p class="text-danger" id="updated_failed"></p>
-        <p id="updated_failed_detail"></p>
-    </div>
-{% endblock %}