models.py
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from django.db import models
from django.db.models import JSONField, DateField
import numpy as np
# Create your models here.
import json
from json import JSONEncoder
import numpy
class NumpyArrayEncoder(JSONEncoder):
def default(self, obj):
if isinstance(obj, numpy.ndarray):
return obj.tolist()
return JSONEncoder.default(self, obj)
class EffectiveSchedule(models.Model):
scheduler_matrix = JSONField(blank=True, null=True)
def save(self, *args, **kwargs):
# Transform numpy matrix to JSON
scheduler_matrix_as_json = json.dumps(self.scheduler_matrix, cls=NumpyArrayEncoder)
self.scheduler_matrix = scheduler_matrix_as_json
super(EffectiveSchedule, self).save(*args, **kwargs)
def get(self, *args, **kwargs):
# Transform JSON to numpy matrix
matrix_as_json = json.loads(self.scheduler_matrix)
self.scheduler_matrix = numpy.asarray(matrix_as_json["array"])
return super().get(**kwargs)
class PredictiveSchedule(models.Model):
scheduler_matrix = JSONField(blank=True, null=True)
def save(self, *args, **kwargs):
# Transform numpy matrix to JSON
scheduler_matrix_as_json = json.dumps(self.scheduler_matrix, cls=NumpyArrayEncoder)
self.scheduler_matrix = scheduler_matrix_as_json
super(EffectiveSchedule, self).save(*args, **kwargs)
def get(self, *args, **kwargs):
# Transform JSON to numpy matrix
matrix_as_json = json.loads(self.scheduler_matrix)
self.scheduler_matrix = numpy.asarray(matrix_as_json["array"])
return super().get(**kwargs)
class SchedulerHistory(EffectiveSchedule):
night_date = models.DateField(blank=True, null=True)