substitutions: use constants

models/redner_substitution.py

@@ -141,5 +141,5 @@
     def build_converter(self):
         d = {}
         for sub in self:
-            if sub.converter == "mail_template":
+            if sub.converter == MAIL_TEMPLATE:
                 conv = converter.MailTemplate(sub.value, False)
@@ -145,3 +145,3 @@
                 conv = converter.MailTemplate(sub.value, False)
-            elif sub.converter == "mail_template+deserialize":
+            elif sub.converter == MAIL_TEMPLATE_DESERIALIZE:
                 conv = converter.MailTemplate(sub.value, True)
@@ -147,3 +147,3 @@
                 conv = converter.MailTemplate(sub.value, True)
-            elif sub.converter == "constant":
+            elif sub.converter == CONSTANT:
                 conv = converter.Constant(sub.value)
@@ -149,5 +149,5 @@
                 conv = converter.Constant(sub.value)
-            elif sub.converter == "field":
+            elif sub.converter == FIELD:
                 if "." in sub.value:
                     path, name = sub.value.rsplit(".", 1)
                 else:
@@ -155,7 +155,7 @@
                 conv = converter.Field(name)
                 if path:
                     conv = converter.relation(path.replace(".", "/"), conv)
-            elif sub.converter == "image-file":
+            elif sub.converter == IMAGE_FILE:
                 if "." in sub.value:
                     path, name = sub.value.rsplit(".", 1)
                 else:
@@ -163,5 +163,5 @@
                 conv = converter.ImageFile(name)
                 if path:
                     conv = converter.relation(path.replace(".", "/"), conv)
-            elif sub.converter == "image-data-url":
+            elif sub.converter == IMAGE_DATAURL:
                 conv = converter.ImageDataURL(sub.value)
@@ -167,5 +167,5 @@
                 conv = converter.ImageDataURL(sub.value)
-            elif sub.converter == "relation-to-many":
+            elif sub.converter == RELATION_2MANY:
                 # Unpack the result of finding a field with its sort order into
                 # variable names.
                 value, sorted = parse_sorted_field(sub.value)
@@ -175,7 +175,7 @@
                     sortkey=sortkey(sorted) if sorted else None,
                     converter=sub.get_children().build_converter(),
                 )
-            elif sub.converter == "relation-path":
+            elif sub.converter == RELATION_PATH:
                 conv = converter.relation(
                     sub.value, sub.get_children().build_converter()
                 )