Saving Contionus Data through Django

[nitinag...@gmail.com]

Hello All

I am new to Django. And, I need help in models file.
I made a table - device_list. It contain one filed as device_id.
Now, I need to store 3 continuous data stream which is coming like 1 entry per minute each for this device_id.
All 3 data streams will have different timestamps and that also needs to be stored.

So, what is the best way to store the stream ?

[Ilya Kazakevich]

You can't just store stream in database.

You need to buffer it first, and then save to field like blob: http://www.postgresql.org/docs/9.1/static/datatype-binary.html

I am not sure that relational database is the best place to store binary data coming from devices.

[aRkadeFR]

Not sure Django is the best solution to your problem.

As Ilya said, you should buffer it. Then you can work
with your buffered data. You said one entry every minute,
so the "buffer" can just send this entry every minute to
a Django project?

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[Mike Dewhirst]

Ok - so each device has three datastreams. You need to decide whether
the data in each stream should be stored in a single table or perhaps in
two or three tables. Without knowing what you want to store it isn't
possible to advise you.

Anyway, each datastream model needs to have a foreign-key into the
device_list model. To record the time you include a field of class
models.DateTimeField with an auto_now_add=True option which puts the
current date/time into that field.
https://docs.djangoproject.com/en/1.8/ref/models/fields/#datetimefield

By the way, it would be more conventional to name that model (ie.,
table) device rather than device_list.

If you are new to Django, the best advice usually given is to work
through the tutorial. That will show you how to establish foreign key
relationships between models.

I think Django is fantastic and I hope you enjoy.

Mike

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