Fixed DB Views accession link (no longer empty if no urlprefix-now displays unlinked accession) and added relationship so you can view the db name (and any other db field) in stock, feature and cvterm views

tripal_core/views_handlers/views_handler_field_dbxref_accession_link.inc

@@ -28,10 +28,10 @@ class views_handler_field_dbxref_accession_link extends views_handler_field {
        $accession_link = $urlprefix . $accession;
        return($accession_link); 
      } else {
-       return '';
+       return $accession;
      }
    } else {
-     return '';
+     return $accession;
    }
  } 
 } 

tripal_db/views/db.views.inc

@@ -35,6 +35,21 @@ function retrieve_db_views_data() {
       'left_field' => 'db_id',
       'field' => 'db_id',
     ),
+    'stock' => array(
+    	'left_table' => 'dbxref',
+    	'left_field' => 'db_id',
+    	'field' => 'db_id',
+    ),
+    'cvterm' => array(
+    	'left_table' => 'dbxref',
+    	'left_field' => 'db_id',
+    	'field' => 'db_id',
+    ),
+    'feature' => array(
+    	'left_table' => 'dbxref',
+    	'left_field' => 'db_id',
+    	'field' => 'db_id',
+    ),
   );
   
   // Table Field Definitions----------------------

tripal_db/views/dbxref.views.inc

@@ -43,7 +43,7 @@ function retrieve_dbxref_views_data() {
     'stock' => array(
       'left_field' => 'dbxref_id',
       'field' => 'dbxref_id',
-    ),     
+    ),  
   );
 
   // Table Field Definitions----------------------
@@ -120,7 +120,7 @@ function retrieve_dbxref_views_data() {
     ),
   );
 
-  // Calculated Field: Accession Link (varchar 1024)
+  // Calculated Field: Accession Link
   //  uses custom field handler to pull db urlprefix and concatenate with accession
   //  solves the problem of not being able to add urlprefix to tables which only
   //  join to dbxref table (not db)

tripal_stock/views/stock.views.inc

@@ -46,11 +46,9 @@ function retrieve_stock_views_data() {
       'left_field' => 'organism_id',
       'field' => 'organism_id',
     ),
-    'dbxref' => array(
-     'left_field' => 'dbxref_id',                                                                                                                                                                                                   
-      'field' => 'dbxref_id',
-    ),
-  );  
+  ); 
+  
+  
 
 	// Table Field Definitions----------------------
   // Field: feature_id (primary key)