# С этими моделями всё нормально
class Reaction(models.Model):
    reaction = models.TextField(blank=True)


class Catalyst(models.Model):
    reaction = models.OneToOneField(Reaction)
    name = models.TextField(blank=True)
    composition = models.TextField(blank=True)
    sketch = models.TextField(blank=True)


class Characteristic(models.Model):
    reaction = models.OneToOneField(Reaction)
    activity_rate = models.FloatField(default=0)
    life_time_min = models.FloatField(default=0)
    life_time_max = models.FloatField(default=0)
    surf_area = models.FloatField(default=0)


class Comment(models.Model):
    reaction = models.OneToOneField(Reaction)
    comment = models.TextField(blank=True)


class Condition(models.Model):
    reaction = models.OneToOneField(Reaction)
    temp_min = models.FloatField()
    temp_max = models.FloatField()
    pressure_min = models.FloatField()
    pressure_max = models.FloatField()
    space_velocity_min = models.FloatField()
    space_velocity_max = models.FloatField()

# А вот с этими нет
class Product:
    reaction = models.ForeignKey(Reaction)
    formula = models.TextField(blank=True)
    product = models.TextField(blank=True)
    product_upac = models.TextField(blank=True)
    casn_r = models.CharField(max_length=30, blank=True)
    sketch = models.TextField(blank=True)
    selectivity_min = models.FloatField()
    selectivity_max = models.FloatField()
    yield_min = models.FloatField()
    yield_max = models.FloatField()
    ee_min = models.FloatField()
    ee_max = models.FloatField()
    dr_min = models.FloatField()
    dr_max = models.FloatField()


class Reactant:
    reaction = models.ForeignKey(Reaction)
    formula = models.TextField(blank=True)
    reactant = models.TextField(blank=True)
    reactant_upac = models.TextField(blank=True)
    casn_r = models.CharField(max_length=30, blank=True)
    sketch = models.TextField(blank=True)
    activity_conversion_min = models.FloatField()
    activity_conversion_max = models.FloatField()


class Reference:
    reaction = models.OneToOneField(Reaction)
    authors = models.TextField(blank=True)
    literature = models.TextField(blank=True)
    title = models.TextField(blank=True)
    year = models.IntegerField(max_length=4, blank=True)
    volume = models.CharField(max_length=30, blank=True)
    issn_isbn = models.CharField(max_length=100, blank=True)
    publisher = models.TextField(blank=True)
    no_issue = models.CharField(max_length=30, blank=True)
    pages = models.CharField(max_length=30, blank=True)