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models.py
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models.py
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from __future__ import unicode_literals
from django import forms
from django.conf import settings
from django.core.exceptions import ValidationError
from django.core.urlresolvers import reverse
from django.db import models
from django.db.models import Max
from django.template.defaultfilters import slugify
from django.utils import timezone
from django.utils.encoding import python_2_unicode_compatible
from jsonfield import JSONField
from .fields import LimitedMultipleChoiceField
from .forms import MultipleTextField, MultiTextWidget
from .forms.widgets import LikertSelect, RatingSelect
@python_2_unicode_compatible
class OrdinalScale(models.Model):
ORDINAL_KIND_LIKERT = "likert"
ORDINAL_KIND_RATING = "rating"
ORDINAL_KIND_CHOICES = [
(ORDINAL_KIND_LIKERT, "Likert Scale"),
(ORDINAL_KIND_RATING, "Rating Scale")
]
name = models.CharField(max_length=100)
kind = models.CharField(max_length=6, choices=ORDINAL_KIND_CHOICES)
def __str__(self):
return "{} [{}]".format(self.name, ", ".join([str(c) for c in self.choices.order_by("score")]))
@python_2_unicode_compatible
class OrdinalChoice(models.Model):
scale = models.ForeignKey(OrdinalScale, related_name="choices")
label = models.CharField(max_length=100)
score = models.IntegerField()
def __str__(self):
return "{} ({})".format(self.label, self.score)
class Meta:
unique_together = [("scale", "score"), ("scale", "label")]
@python_2_unicode_compatible
class Survey(models.Model):
name = models.CharField(max_length=255)
creator = models.ForeignKey(settings.AUTH_USER_MODEL, related_name="surveys")
created = models.DateTimeField(default=timezone.now)
updated = models.DateTimeField(default=timezone.now)
published = models.DateTimeField(null=True, blank=True)
def save(self, *args, **kwargs):
if self.pk:
self.updated = timezone.now()
return super(Survey, self).save(*args, **kwargs)
def __str__(self):
return self.name
def get_absolute_url(self):
return reverse("formly_dt_survey_detail", kwargs={"pk": self.pk})
def duplicate(self): # @@@ This could like use with some refactoring
survey = Survey.objects.get(pk=self.pk)
survey.pk = None
survey.save()
survey.pages.all().delete()
pages = {}
page_targets = []
choice_targets = []
for page in Survey.objects.get(pk=self.pk).pages.all():
orig_page_target = page.target
orig_page_pk = page.pk
page.pk = None
page.survey = survey
page.target = None
page.save()
pages[orig_page_pk] = page
if orig_page_target:
page_targets.append({
"page": page,
"orig_target_pk": orig_page_target.pk
})
for field in Page.objects.get(pk=orig_page_pk).fields.all():
orig_field_pk = field.pk
field.pk = None
field.survey = survey
field.page = page
field.save()
for choice in Field.objects.get(pk=orig_field_pk).choices.all():
orig_target = choice.target
choice.pk = None
choice.field = field
choice.target = None
choice.save()
if orig_target:
choice_targets.append({
"choice": choice,
"orig_target_pk": orig_target.pk
})
for page_target in page_targets:
page = page_target["page"]
page.target = pages[page_target["orig_target_pk"]]
page.save()
for choice_target in choice_targets:
choice = choice_target["choice"]
choice.target = pages[choice_target["orig_target_pk"]]
choice.save()
return survey
@property
def fields(self):
for page in self.pages.all():
for field in page.fields.all():
yield field
def next_page(self, user):
return self.first_page().next_page(user=user)
def first_page(self):
if self.pages.count() == 0:
self.pages.create()
return self.pages.all()[0]
def publish(self):
self.published = timezone.now()
self.save()
@python_2_unicode_compatible
class Page(models.Model):
survey = models.ForeignKey(Survey, related_name="pages")
page_num = models.PositiveIntegerField(null=True, blank=True)
subtitle = models.CharField(max_length=255, blank=True)
# Should be null when a FieldChoice on it's last field has a target.
target = models.ForeignKey("self", null=True, blank=True)
class Meta:
unique_together = [
("survey", "page_num")
]
ordering = ["survey", "page_num"]
def save(self, *args, **kwargs):
if self.page_num is None:
max_page = self.survey.pages.aggregate(Max("page_num"))
self.page_num = (max_page.get("page_num__max") or 0) + 1
return super(Page, self).save(*args, **kwargs)
def __str__(self):
return self.label()
def label(self):
if self.subtitle:
return self.subtitle
else:
return "Page %d" % self.page_num
def get_absolute_url(self):
return reverse("formly_dt_page_detail", kwargs={"pk": self.pk})
def move_up(self):
try:
other_field = self.survey.pages.order_by("-page_num").filter(
page_num__lt=self.page_num
)[0]
existing = self.page_num
other = other_field.page_num
self.page_num = other
other_field.page_num = existing
other_field.save()
self.save()
except IndexError:
return
def move_down(self):
try:
other_field = self.page.fields.order_by("page_num").filter(
page_num__gt=self.page_num
)[0]
existing = self.page_num
other = other_field.page_num
self.page_num = other
other_field.page_num = existing
other_field.save()
self.save()
except IndexError:
return
def next_page(self, user):
target = self
if self.completed(user=user):
try:
target = self.survey.pages.get(
page_num=self.page_num + 1
)
except Page.DoesNotExist:
target = None
if self.target:
target = self.target
if target and target.completed(user=user):
target = target.next_page(user=user)
return target
def completed(self, user):
return self.results.filter(result__user=user).count() > 0
def is_last_page(self):
return self.next_page() is None
@python_2_unicode_compatible
class Field(models.Model):
TEXT_FIELD = 0
TEXT_AREA = 1
RADIO_CHOICES = 2
DATE_FIELD = 3
SELECT_FIELD = 4
CHECKBOX_FIELD = 5
MEDIA_FIELD = 6
BOOLEAN_FIELD = 7
MULTIPLE_TEXT = 8
LIKERT_FIELD = 9
RATING_FIELD = 10
FIELD_TYPE_CHOICES = [
(TEXT_FIELD, "Free Response - One Line"),
(TEXT_AREA, "Free Response - Box"),
(RADIO_CHOICES, "Multiple Choice - Pick One"),
(SELECT_FIELD, "Multiple Choice - Pick One (Dropdown)"),
(CHECKBOX_FIELD, "Multiple Choice - Can select multiple answers"),
(DATE_FIELD, "Date"),
(MEDIA_FIELD, "File Upload"),
(BOOLEAN_FIELD, "True/False"),
(MULTIPLE_TEXT, "Multiple Free Responses - Single Lines"),
(LIKERT_FIELD, "Likert Scale"),
(RATING_FIELD, "Rating Scale")
]
survey = models.ForeignKey(Survey, related_name="fields") # Denorm
page = models.ForeignKey(Page, null=True, blank=True, related_name="fields")
label = models.TextField()
field_type = models.IntegerField(choices=FIELD_TYPE_CHOICES)
scale = models.ForeignKey(OrdinalScale, default=None, null=True, blank=True, related_name="fields")
help_text = models.TextField(blank=True)
ordinal = models.IntegerField()
maximum_choices = models.IntegerField(null=True, blank=True)
# Should this be moved to a separate Constraint model that can also
# represent cross field constraints
required = models.BooleanField(default=False)
expected_answers = models.PositiveSmallIntegerField(default=1)
# def clean(self):
# super(Field, self).clean()
# if self.page is None:
# if self.target_choices.count() == 0:
# raise ValidationError(
# "A question not on a page must be a target of a choice from another question"
# )
def save(self, *args, **kwargs):
self.full_clean()
if not self.pk and self.page is not None:
self.ordinal = (self.page.fields.aggregate(
Max("ordinal")
)["ordinal__max"] or 0) + 1
return super(Field, self).save(*args, **kwargs)
def move_up(self):
try:
other_field = self.page.fields.order_by("-ordinal").filter(
ordinal__lt=self.ordinal
)[0]
existing = self.ordinal
other = other_field.ordinal
self.ordinal = other
other_field.ordinal = existing
other_field.save()
self.save()
except IndexError:
return
def move_down(self):
try:
other_field = self.page.fields.order_by("ordinal").filter(
ordinal__gt=self.ordinal
)[0]
existing = self.ordinal
other = other_field.ordinal
self.ordinal = other
other_field.ordinal = existing
other_field.save()
self.save()
except IndexError:
return
class Meta:
ordering = ["ordinal"]
def __str__(self):
return "%s of type %s on %s" % (
self.label, self.get_field_type_display(), self.survey
)
def get_absolute_url(self):
return reverse("formly_dt_field_update", kwargs={"pk": self.pk})
@property
def needs_choices(self):
return self.field_type in [
Field.RADIO_CHOICES,
Field.SELECT_FIELD,
Field.CHECKBOX_FIELD
]
@property
def name(self):
return slugify(self.label)
@property
def is_multiple(self):
return self.field_type == Field.MULTIPLE_TEXT
def form_field(self):
if self.field_type in [Field.LIKERT_FIELD, Field.RATING_FIELD]:
if self.scale:
choices = [(x.pk, x.label) for x in self.scale.choices.all().order_by("score")]
else:
choices = []
else:
choices = [(x.pk, x.label) for x in self.choices.all()]
field_class, field_kwargs = self._get_field_class(choices)
field = field_class(**field_kwargs)
return field
def _get_field_class(self, choices):
"""
Set field_class and field kwargs based on field type
"""
field_class = forms.CharField
kwargs = dict(
label=self.label,
help_text=self.help_text,
required=self.required
)
field_type = FIELD_TYPES.get(self.field_type, {})
field_class = field_type.get("field_class", field_class)
kwargs.update(**field_type.get("kwargs", {}))
if self.field_type in [Field.CHECKBOX_FIELD, Field.SELECT_FIELD, Field.RADIO_CHOICES, Field.LIKERT_FIELD, Field.RATING_FIELD]:
kwargs.update({"choices": choices})
if self.field_type == Field.CHECKBOX_FIELD:
kwargs.update({"maximum_choices": self.maximum_choices})
elif self.field_type == Field.MULTIPLE_TEXT:
kwargs.update({
"fields_length": self.expected_answers,
"widget": MultiTextWidget(widgets_length=self.expected_answers),
})
return field_class, kwargs
FIELD_TYPES = {
Field.TEXT_AREA: dict(
field_class=forms.CharField,
kwargs=dict(
widget=forms.Textarea()
)
),
Field.RADIO_CHOICES: dict(
field_class=forms.ChoiceField,
kwargs=dict(
widget=forms.RadioSelect()
)
),
Field.LIKERT_FIELD: dict(
field_class=forms.ChoiceField,
kwargs=dict(
widget=LikertSelect()
)
),
Field.RATING_FIELD: dict(
field_class=forms.ChoiceField,
kwargs=dict(
widget=RatingSelect()
)
),
Field.DATE_FIELD: dict(
field_class=forms.DateField,
kwargs=dict()
),
Field.SELECT_FIELD: dict(
field_class=forms.ChoiceField,
kwargs=dict(
widget=forms.Select()
)
),
Field.CHECKBOX_FIELD: dict(
field_class=LimitedMultipleChoiceField,
kwargs=dict(
widget=forms.CheckboxSelectMultiple()
)
),
Field.BOOLEAN_FIELD: dict(
field_class=forms.BooleanField,
kwargs=dict()
),
Field.MEDIA_FIELD: dict(
field_class=forms.FileField,
kwargs=dict()
),
Field.MULTIPLE_TEXT: dict(
field_class=MultipleTextField,
kwargs=dict()
)
}
@python_2_unicode_compatible
class FieldChoice(models.Model):
field = models.ForeignKey(Field, related_name="choices")
label = models.CharField(max_length=100)
target = models.ForeignKey(Field, null=True, blank=True, related_name="target_choices")
def clean(self):
super(FieldChoice, self).clean()
if self.target is not None:
if self.target.page:
raise ValidationError(
"FieldChoice target's can only be questions not associated with a page."
)
def save(self, *args, **kwargs):
self.full_clean()
return super(FieldChoice, self).save(*args, **kwargs)
def __str__(self):
return self.label
@python_2_unicode_compatible
class SurveyResult(models.Model):
survey = models.ForeignKey(Survey, related_name="survey_results")
user = models.ForeignKey(settings.AUTH_USER_MODEL, related_name="survey_results")
date_submitted = models.DateTimeField(default=timezone.now)
def get_absolute_url(self):
return reverse("survey_edit", kwargs={"pk": self.pk, "page": 1})
def __str__(self):
return self.survey.name
@python_2_unicode_compatible
class FieldResult(models.Model):
survey = models.ForeignKey(Survey, related_name="results") # Denorm
page = models.ForeignKey(Page, related_name="results") # Denorm
result = models.ForeignKey(SurveyResult, related_name="results")
question = models.ForeignKey(Field, related_name="results")
upload = models.FileField(upload_to="formly/", blank=True)
answer = JSONField(blank=True) # @@@ I think this should be something different than a string
def answer_value(self):
if self.answer:
return self.answer.get("answer")
def answer_display(self):
val = self.answer_value()
if val:
if self.question.needs_choices:
if self.question.field_type == Field.CHECKBOX_FIELD:
return ", ".join([str(FieldChoice.objects.get(pk=int(v))) for v in val])
return FieldChoice.objects.get(pk=int(val)).label
if self.question.field_type in [Field.LIKERT_FIELD, Field.RATING_FIELD]:
choice = OrdinalChoice.objects.get(pk=int(val))
return "{} ({})".format(choice.label, choice.score)
return val
def __str__(self):
return self.survey.name
class Meta:
ordering = ["result", "question"]