Part 2 of this question asked and answered separately.

I have a Report and a ReportTemplate.

+----+----------+---------------+-------------+
| id |  title   |     data      | template_id |
+----+----------+---------------+-------------+
|  1 | report 1 | {data: [...]} |           1 |
+----+----------+---------------+-------------+reports table+----+-----------+---------------+------------+
| id |   title   |    markup     |    css     |
+----+-----------+---------------+------------+
|  1 | template1 | <doctype!>... | body {.... |
+----+-----------+---------------+------------+templates table

A Report belongs to a ReportTemplate. A ReportTemplate has many Report.

I have a custom admin action for Report in admin.py called print_as_pdf

class ReportAdmin(admin.ModelAdmin):fields = ['commodity', 'date','trade_period','quantity_cutoff','data','template','title']actions = ['print_as_pdf']def print_as_pdf(self, request, queryset):returnprint_as_pdf.short_description = 'Generate as pdf'

These are models:

class ReportTemplate(models.Model):title = models.CharField(max_length=50)markup = models.TextField(default = 'markup here...')styles = models.TextField(default = 'styles here...')# __unicode__ on Python 2# __str__ on Python 3def __unicode__(self):return self.titleclass Report(models.Model):title = models.CharField(max_length=50)commodity = models.CharField(max_length=10)date = models.DateTimeField('date traded')trade_period = models.CharField(max_length=10, default='open')quantity_cutoff = models.IntegerField(default=0)printed = models.BooleanField(default=0)datetime_email_sent = models.DateTimeField('date email sent', blank=True, null=True)data = models.TextField(default = 'data here...')template = models.ForeignKey(ReportTemplate)

What I want to do is:

1. retrieve the associated ReportTemplate and its markup field value
2. put the data field value of the Report through the markup value in 1 which is written with jinja2 markup
3. use weasyprint and print out the data-filled markup from 2 as pdf

I am stuck at step 1.

Given the parameters self, request, queryset, how do I retrieve the associated ReportTemplate and its markup field value?

UPDATE 1:

I tried this to test one of the answers given.

import logginglogger = logging.getLogger(__name__)# .... code here ...def print_as_pdf(self, request, queryset):for report in queryset:markup = report.template.markuplogger.debug(markup)return

UPDATE 2:

# Logging
LOGGING = {'version': 1,'disable_existing_loggers': False,'handlers': {'file': {'level': 'DEBUG','class': 'logging.FileHandler','filename': '/var/virtual/WebApps/virtualenvs/WeasyPrintProject/weasyprint_site/debug.log',},},'loggers': {'reports.admin': {'handlers': ['file'],'level': 'DEBUG','propagate': True,},},
}

Wrote this in my settings.py

Generated a debug.log

However, contents of debug.log are empty

UPDATE 3:

needed to explicitly change

logger = logging.getLogger(__name__)

to

logger = logging.getLogger('reports.admin')

Just get the template field of your Report model:

def print_as_pdf(self, request, queryset):for report in queryset:markup = report.template.markup...
print_as_pdf.short_description = 'Generate as pdf'

UPDATE: To use the logger you should add these two lines at the beginning of the source file:

import logginglogger = logging.getLogger(__name__)