Add ESP templates, batch send and merge

* message.template_id to use ESP stored templates
* message.merge_data and merge_global_data
  to supply per-recipient/global merge variables
  (with or without an ESP stored template)
* When using per-recipient merge_data, tell ESP to use
  batch send: individual message per "to" address.
  (Mailgun does this automatically; SendGrid requires
  using a different "to" field; Mandrill requires
  `preserve_recipients=False`; Postmark doesn't
  support *this type* of batch sending with merge data.)
* Allow message.from_email=None (must be set after
  init) and message.subject=None to suppress those
  fields in API calls (for ESPs that allow "From" and
  "Subject" in their template definitions).

Mailgun:
* Emulate merge_global_data by copying to
  recipient-variables for each recipient.

SendGrid:
* Add delimiters to merge field names via
  esp_extra['merge_field_format'] or
  ANYMAIL_SENDGRID_MERGE_FIELD_FORMAT setting.

Mandrill:
* Remove Djrill versions of these features;
  update migration notes.

Closes #5.
This commit is contained in:
medmunds
2016-05-03 18:25:37 -07:00
parent 271eb5c926
commit 75730e8219
20 changed files with 882 additions and 245 deletions

View File

@@ -27,14 +27,14 @@ Example that builds an email from the templates ``message_subject.txt``,
from django.template import Context
from django.template.loader import render_to_string
template_data = {
merge_data = {
'ORDERNO': "12345", 'TRACKINGNO': "1Z987"
}
plaintext_context = Context(autoescape=False) # HTML escaping not appropriate in plaintext
subject = render_to_string("message_subject.txt", template_data, plaintext_context)
text_body = render_to_string("message_body.txt", template_data, plaintext_context)
html_body = render_to_string("message_body.html", template_data)
subject = render_to_string("message_subject.txt", merge_data, plaintext_context)
text_body = render_to_string("message_body.txt", merge_data, plaintext_context)
html_body = render_to_string("message_body.html", merge_data)
msg = EmailMultiAlternatives(subject=subject, from_email="store@example.com",
to=["customer@example.com"], body=text_body)