I'm stuck with this as I can't find any relevant tutorials online. I would like to

1. export all of the data in a model to the txt file format {actually xml but I think that's besides the point}
2. where each row in the model is a seperate file
3. and saved to a relative local path to the database
4. with the folder and filenames for each being derived from two fields in the model
5. I also need these to replace any existing files of the same name

Where would I start? All I can do currently is export a txt file with all records together as a downloadable attachment.

This is what the code would like if I were presenting it as a HTML page, however of course the filename and folder fields are not referenced.

<?xml version="1.0" encoding="utf-8" standalone="yes"?>
<movie>
  <plot />
  <outline />
  <title>{{ misc.title }}</title>
  <release date>{{ misc.d_released }}</release date>

  </fileinfo>
</movie>

Here are the fields

class misc(models.Model):
d_created = models.DateTimeField(auto_now_add=True)
filename = models.CharField(max_length=250)
folder = models.ForeignKey(folder, default="1", blank=True, null=True, on_delete=models.CASCADE)
title = models.CharField(max_length=250, default='', blank=True, null=True)
d_released = models.CharField(max_length=25, default='', blank=True, null=True)
description = models.TextField(blank = True, null = True)

def __str__(self):
    return self.title

class Meta:
    ordering = ('-id', )

CodePudding user response：

Seems like you don't need Django for this task (maybe).

UPD:

Use CSV! Your Excel could export data into a .csv file - this is a very simple format and very easy to start with Python.

Place your .csv near you python script otherwise provide a full path to the file:

import csv
with open('file.csv', newline='') as csvfile:
    reader = csv.reader(csvfile, delimiter=' ', quotechar='|')
    for row in reader:
        print(', '.join(row))

So check that you can read the data of your rows. Docs

Next, let's make a handler for your rows:

Here you can use XML builder but this is not a quick way. Let's make something like a text template and replace the needed macros with your row's values as you defined in the beginning.

f`text {param}`

Finally, how to write this to the filesystem? Easy!

First, how to create a dir or nested dirs? A good thread here:

How can I safely create a nested directory?

So create a needed dir and then you can concatenate dir needed filename to create a file:

with open("full_path_to_future_file.xml", "w") as f:
   f.write(rendered_xml_as_text)

All these stuff you can do when iterating in your for row in reader: cycle, of course.

Call your script like python script.py and task solved!