Add SQLAlchemy and Django examples

# orm_project

# Object-Relational Mapping Examples

In this repository are available some easy Object-Relational Mapping (ORM) examples.

## Getting started

To make it easy for you to get started with GitLab, here's a list of recommended next steps.

Already a pro? Just edit this README.md and make it your own. Want to make it easy? [Use the template at the bottom](#editing-this-readme)!

## Add your files

- [ ] [Create](https://docs.gitlab.com/ee/user/project/repository/web_editor.html#create-a-file) or [upload](https://docs.gitlab.com/ee/user/project/repository/web_editor.html#upload-a-file) files

- [ ] [Add files using the command line](https://docs.gitlab.com/ee/gitlab-basics/add-file.html#add-a-file-using-the-command-line) or push an existing Git repository with the following command:

```

cd existing_repo

git remote add origin https://www.ict.inaf.it/gitlab/bignamini/orm_project.git

git branch -M main

git push -uf origin main

```

## Integrate with your tools

- [ ] [Set up project integrations](https://www.ict.inaf.it/gitlab/bignamini/orm_project/-/settings/integrations)

## Collaborate with your team

- [ ] [Invite team members and collaborators](https://docs.gitlab.com/ee/user/project/members/)

- [ ] [Create a new merge request](https://docs.gitlab.com/ee/user/project/merge_requests/creating_merge_requests.html)

- [ ] [Automatically close issues from merge requests](https://docs.gitlab.com/ee/user/project/issues/managing_issues.html#closing-issues-automatically)

- [ ] [Enable merge request approvals](https://docs.gitlab.com/ee/user/project/merge_requests/approvals/)

- [ ] [Set auto-merge](https://docs.gitlab.com/ee/user/project/merge_requests/merge_when_pipeline_succeeds.html)

## Test and Deploy

Use the built-in continuous integration in GitLab.

- [ ] [Get started with GitLab CI/CD](https://docs.gitlab.com/ee/ci/quick_start/index.html)

- [ ] [Analyze your code for known vulnerabilities with Static Application Security Testing (SAST)](https://docs.gitlab.com/ee/user/application_security/sast/)

- [ ] [Deploy to Kubernetes, Amazon EC2, or Amazon ECS using Auto Deploy](https://docs.gitlab.com/ee/topics/autodevops/requirements.html)

- [ ] [Use pull-based deployments for improved Kubernetes management](https://docs.gitlab.com/ee/user/clusters/agent/)

- [ ] [Set up protected environments](https://docs.gitlab.com/ee/ci/environments/protected_environments.html)

***

# Editing this README

When you're ready to make this README your own, just edit this file and use the handy template below (or feel free to structure it however you want - this is just a starting point!). Thanks to [makeareadme.com](https://www.makeareadme.com/) for this template.

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# ORM Example - Euclid

Create the anaconda environment for this example

    conda create -n orm_django django

To activate this environment, use

    conda activate orm_django

Additional packages are needed, not available in Anaconda but installed with the `pip` command

    pip install django-extensions djangorestframework

    pip install django-composite-field django-ufilter

To deactivate an active environment, use

    conda deactivate

## Run the Django Project

Apply migrations

    python manage.py migrate

Create an admin user

    python manage.py createsuperuser

You can access the database throught the Django shell

    python manage.py shell

or running the Django web server

    python manage.py runserver

then access to <http://127.0.0.1:8000/admin>.

import xml.etree.ElementTree as ET

import glob

from datetime import datetime

from imagedb.models import *

flist = glob.glob('resources/*.xml')

try:

  inst = Instrument.objects.get(instrumentName="NISP")

except:

  inst = Instrument.objects.create(telescopeName='Euclid', instrumentName='NISP')

for f in flist:

  root = ET.parse(f)

  exposureTime = float(root.find(".//ExposureTime/Value").text)

  print(root.find(".//OBT").text) 

  observationDate = datetime.strptime(root.find(".//OBT").text, 

                                      "%Y-%m-%dT%H:%M:%S.%f")

  obs_id = int(root.find(".//FieldId").text)

  dither = int(root.find(".//DitherObservation").text)

  ra = float(root.find(".//TargetPointing/RA").text)

  dec = float(root.find(".//TargetPointing/Dec").text)

  orientation = float(root.find(".//TargetPointing/Orientation").text)

  filterWheelPos = root.find(".//Filter").text[4]

  file_name = root.find(".//DataStorage/DataContainer/FileName").text

  file_name = file_name.replace("NIR_W-CALIB","LE1_NISP")

  data = DataContainer(

    fileFormat = 'fits',

    formatIdentifier = 'le1.nisprawframe',

    formatVersion = '1.0',

    url = "http://ia2-owncloud.oats.inaf.it/fake/7ff2f203/data/" + file_name    

  )

  data.save()

  image = NispRawFrame(

    exposureTime = exposureTime,

    imgNumber = 16,

    naxis1 = 2040,

    naxis2 = 2040,

    imageType = {'category':'SCIENCE', 

                 'firstType':'OBJECT', 

                 'secondType':'SKY'},

    observationDateTime = observationDate,

    observationId = obs_id,

    ditherNumber = dither,

    instrument = inst,

    commandedPointing = {'rightAscension':ra,

                         'declination':dec,

                         'orientation':orientation},

    filterWheelPosition = filterWheelPos,

    grismWheelPosition = 'OPEN'   

  )

  image.frameFile = data

  image.save()

  detList = root.findall('.//Detector')

  detList = sorted(detList, key = lambda x : x.find(".//DetectorId").text)

  for d in detList:

    det_id = d.find(".//DetectorId").text

    gain = float(d.find(".//Gain").text)

    readoutNoise = float(d.find(".//ReadoutNoise").text)

    detector = image.detectors.create(

      detectorId = det_id,

      gain = gain,

      readoutNoise = readoutNoise

    )

    coordinate1 = d.find(".//CTYPE1/CoordinateType").text

    projection1 = d.find(".//CTYPE1/ProjectionType").text

    coordinate2 = d.find(".//CTYPE2/CoordinateType").text

    projection2 = d.find(".//CTYPE2/ProjectionType").text

    crval1 = float(d.find(".//CRVAL1").text)

    crval2 = float(d.find(".//CRVAL2").text)

    crpix1 = float(d.find(".//CRPIX1").text)

    crpix2 = float(d.find(".//CRPIX2").text)

    cd1_1 = float(d.find(".//CD1_1").text)

    cd1_2 = float(d.find(".//CD1_2").text)

    cd2_1 = float(d.find(".//CD2_1").text)

    cd2_2 = float(d.find(".//CD2_2").text)

    Astrometry.objects.create(

      ctype1 = {'coordinateType': coordinate1, 'projectionType': 'TAN'},

      ctype2 = {'coordinateType': coordinate2, 'projectionType': 'TAN'},

      crval1 = crval1,

      crval2 = crval2,

      crpix1 = crpix1,

      crpix2 = crpix2,

      cd1_1 = cd1_1,

      cd1_2 = cd1_2,

      cd2_1 = cd2_1,

      cd2_2 = cd2_2,

      detector = detector

    )

"""

Django settings for euclid_example project.

Generated by 'django-admin startproject' using Django 4.1.

For more information on this file, see

https://docs.djangoproject.com/en/4.1/topics/settings/

For the full list of settings and their values, see

https://docs.djangoproject.com/en/4.1/ref/settings/

"""

from pathlib import Path

# Build paths inside the project like this: BASE_DIR / 'subdir'.

BASE_DIR = Path(__file__).resolve().parent.parent

# Quick-start development settings - unsuitable for production

# See https://docs.djangoproject.com/en/4.1/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!

SECRET_KEY = 'django-insecure-b=h18+$p+el@nqc+7lb7r^b+@xuo26ip92)pd=-=kjiyty&f@%'

# SECURITY WARNING: don't run with debug turned on in production!

DEBUG = True

ALLOWED_HOSTS = []

# Application definition

INSTALLED_APPS = [

    'django.contrib.admin',

    'django.contrib.auth',

    'django.contrib.contenttypes',

    'django.contrib.sessions',

    'django.contrib.messages',

    'django.contrib.staticfiles',

    'django_extensions',

    'imagedb',

    'rest_framework',

    'django_ufilter',

]

REST_FRAMEWORK = {

    'DEFAULT_FILTER_BACKENDS': [

        'django_ufilter.integrations.drf.DRFFilterBackend',

    ]

}

MIDDLEWARE = [

    'django.middleware.security.SecurityMiddleware',

    'django.contrib.sessions.middleware.SessionMiddleware',

    'django.middleware.common.CommonMiddleware',

    'django.middleware.csrf.CsrfViewMiddleware',

    'django.contrib.auth.middleware.AuthenticationMiddleware',

    'django.contrib.messages.middleware.MessageMiddleware',

    'django.middleware.clickjacking.XFrameOptionsMiddleware',

]

ROOT_URLCONF = 'euclid_example.urls'

TEMPLATES = [

    {

        'BACKEND': 'django.template.backends.django.DjangoTemplates',

        'DIRS': [],

        'APP_DIRS': True,

        'OPTIONS': {

            'context_processors': [

                'django.template.context_processors.debug',

                'django.template.context_processors.request',

                'django.contrib.auth.context_processors.auth',

                'django.contrib.messages.context_processors.messages',

            ],

        },

    },

]

WSGI_APPLICATION = 'euclid_example.wsgi.application'

# Database

# https://docs.djangoproject.com/en/4.1/ref/settings/#databases

DATABASES = {

    'default': {

        'ENGINE': 'django.db.backends.sqlite3',

        'NAME': BASE_DIR / 'db.sqlite3',

    }

}

# Password validation

# https://docs.djangoproject.com/en/4.1/ref/settings/#auth-password-validators

AUTH_PASSWORD_VALIDATORS = [

    {

        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',

    },

    {

        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',

    },

    {

        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',

    },

    {

        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',

    },

]

# Internationalization

# https://docs.djangoproject.com/en/4.1/topics/i18n/

LANGUAGE_CODE = 'en-us'

TIME_ZONE = 'UTC'

USE_I18N = True

USE_TZ = False

# Static files (CSS, JavaScript, Images)

# https://docs.djangoproject.com/en/4.1/howto/static-files/

STATIC_URL = 'static/'

# Default primary key field type

# https://docs.djangoproject.com/en/4.1/ref/settings/#default-auto-field

DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'