Field Data Types
In this chapter, we will consider the most useful data types for fields, with other types described in the official documentation.
| Field data type | Python type | Description |
|---|---|---|
| CharField | str | Text-based values |
| IntegerField | int | Positive and negative integer field |
| TextField | str | A large text field without any limitations in character number. |
| DecimalField | float (decimal) | It is a fixed-precision decimal number. More precise than just float numbers in Python. This field typically includes parameters like max_digits and decimal_places |
| DateField | date | A date, presented as datetime.date instance in Python |
| DateTimeField | datetime | A date and time, presented as datetime.datetime instance in Python |
| EmailField | str | String that checks that value is a valid email address. |
| ImageField | ... | Validates that the uploaded object is a valid image. |
The most common field options are:
- max_length (it is the required argument for the CharField field);
- null (if True, it will be possible to store empty values as NULL. Default is False);
- blank (if True, the field is allowed to be blank. Default is False);
- default (You can pass the default value for the field. For example, often used
date_created = models.DateTimeField(default=datetime.utcnow())the current time will be stored as a value); - primary_key (usually used for the id field);
- unique (if True, this field must be unique throughout the table. Useful for nickname field, for example);
- choices (the default form widget will be a select box instead of a standard text field and will limit choices).
Here is an example of how to use the choices field:
1. Which field data type is best for storing a large text without limitations on character number?
2. Which of the following is a required argument for CharField?
3. What does the 'primary_key' option in a Django model field signify?
4. The choices option in a Django model field:
Tudo estava claro?
Obrigado pelo seu feedback!
Seção 2. Capítulo 2
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In this chapter, we will consider the most useful data types for fields, with other types described in the official documentation.
| Field data type | Python type | Description |
|---|---|---|
| CharField | str | Text-based values |
| IntegerField | int | Positive and negative integer field |
| TextField | str | A large text field without any limitations in character number. |
| DecimalField | float (decimal) | It is a fixed-precision decimal number. More precise than just float numbers in Python. This field typically includes parameters like max_digits and decimal_places |
| DateField | date | A date, presented as datetime.date instance in Python |
| DateTimeField | datetime | A date and time, presented as datetime.datetime instance in Python |
| EmailField | str | String that checks that value is a valid email address. |
| ImageField | ... | Validates that the uploaded object is a valid image. |
The most common field options are:
- max_length (it is the required argument for the CharField field);
- null (if True, it will be possible to store empty values as NULL. Default is False);
- blank (if True, the field is allowed to be blank. Default is False);
- default (You can pass the default value for the field. For example, often used
date_created = models.DateTimeField(default=datetime.utcnow())the current time will be stored as a value); - primary_key (usually used for the id field);
- unique (if True, this field must be unique throughout the table. Useful for nickname field, for example);
- choices (the default form widget will be a select box instead of a standard text field and will limit choices).
Here is an example of how to use the choices field:
1. Which field data type is best for storing a large text without limitations on character number?
2. Which of the following is a required argument for CharField?
3. What does the 'primary_key' option in a Django model field signify?
4. The choices option in a Django model field:
Tudo estava claro?
Obrigado pelo seu feedback!
Seção 2. Capítulo 2
