From 62cfdc8023d7acfa83f70249690910fa7a9ee856 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Thu, 23 Jun 2011 13:24:54 -0600
Subject: [PATCH] ...

---
 src/calibre/gui2/library/views.py | 14 +++++++++-----
 src/calibre/library/database2.py  | 14 ++++++++++++++
 2 files changed, 23 insertions(+), 5 deletions(-)

diff --git a/src/calibre/gui2/library/views.py b/src/calibre/gui2/library/views.py
index 9aa926f5c5..d25325be17 100644
--- a/src/calibre/gui2/library/views.py
+++ b/src/calibre/gui2/library/views.py
@@ -591,8 +591,10 @@ class BooksView(QTableView): # {{{
         fmt = prefs['output_format']
 
         def url_for_id(i):
-            ans = db.format(i, fmt, index_is_id=True, as_path=True,
-                    preserve_filename=True)
+            try:
+                ans = db.format_path(i, fmt, index_is_id=True)
+            except:
+                ans = None
             if ans is None:
                 fmts = db.formats(i, index_is_id=True)
                 if fmts:
@@ -600,13 +602,15 @@ class BooksView(QTableView): # {{{
                 else:
                     fmts = []
                 for f in fmts:
-                    ans = db.format(i, f, index_is_id=True, as_path=True,
-                            preserve_filename=True)
+                    try:
+                        ans = db.format_path(i, f, index_is_id=True)
+                    except:
+                        ans = None
             if ans is None:
                 ans = db.abspath(i, index_is_id=True)
             return QUrl.fromLocalFile(ans)
 
-        md.setUrls([url_for_id(i) for i in selected[:25]])
+        md.setUrls([url_for_id(i) for i in selected])
         drag = QDrag(self)
         col = self.selectionModel().currentIndex().column()
         md.column_name = self.column_map[col]
diff --git a/src/calibre/library/database2.py b/src/calibre/library/database2.py
index c9ed5c250a..a3211b3817 100644
--- a/src/calibre/library/database2.py
+++ b/src/calibre/library/database2.py
@@ -1144,6 +1144,20 @@ class LibraryDatabase2(LibraryDatabase, SchemaUpgrade, CustomColumns):
                     break
         return sha.hexdigest()
 
+    def format_path(self, index, fmt, index_is_id=False):
+        '''
+        This method is intended to be used only in those rare situations, like
+        Drag'n Drop, when you absolutely need the path to the original file.
+        Otherwise, use format(..., as_path=True).
+
+        Note that a networked backend will always return None.
+        '''
+        path = self.format_abspath(index, fmt, index_is_id=index_is_id)
+        if path is None:
+            id_ = index if index_is_id else self.id(index)
+            raise NoSuchFormat('Record %d has no format: %s'%(id_, fmt))
+        return path
+
     def format_abspath(self, index, format, index_is_id=False):
         '''
         Return absolute path to the ebook file of format `format`