Docs: use asterisk for unordered list (#8697)

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Shyamkumar Yadav 2022-10-14 15:52:19 +05:30 committed by GitHub
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@ -78,7 +78,7 @@ Defaults to `False`
### `source`
The name of the attribute that will be used to populate the field. May be a method that only takes a `self` argument, such as `URLField(source='get_absolute_url')`, or may use dotted notation to traverse attributes, such as `EmailField(source='user.email')`.
The name of the attribute that will be used to populate the field. May be a method that only takes a `self` argument, such as `URLField(source='get_absolute_url')`, or may use dotted notation to traverse attributes, such as `EmailField(source='user.email')`.
When serializing fields with dotted notation, it may be necessary to provide a `default` value if any object is not present or is empty during attribute traversal. Beware of possible n+1 problems when using source attribute if you are accessing a relational orm model. For example:
@ -171,10 +171,10 @@ Corresponds to `django.db.models.fields.CharField` or `django.db.models.fields.T
**Signature:** `CharField(max_length=None, min_length=None, allow_blank=False, trim_whitespace=True)`
- `max_length` - Validates that the input contains no more than this number of characters.
- `min_length` - Validates that the input contains no fewer than this number of characters.
- `allow_blank` - If set to `True` then the empty string should be considered a valid value. If set to `False` then the empty string is considered invalid and will raise a validation error. Defaults to `False`.
- `trim_whitespace` - If set to `True` then leading and trailing whitespace is trimmed. Defaults to `True`.
* `max_length` - Validates that the input contains no more than this number of characters.
* `min_length` - Validates that the input contains no fewer than this number of characters.
* `allow_blank` - If set to `True` then the empty string should be considered a valid value. If set to `False` then the empty string is considered invalid and will raise a validation error. Defaults to `False`.
* `trim_whitespace` - If set to `True` then leading and trailing whitespace is trimmed. Defaults to `True`.
The `allow_null` option is also available for string fields, although its usage is discouraged in favor of `allow_blank`. It is valid to set both `allow_blank=True` and `allow_null=True`, but doing so means that there will be two differing types of empty value permissible for string representations, which can lead to data inconsistencies and subtle application bugs.
@ -222,11 +222,11 @@ A field that ensures the input is a valid UUID string. The `to_internal_value` m
**Signature:** `UUIDField(format='hex_verbose')`
- `format`: Determines the representation format of the uuid value
- `'hex_verbose'` - The canonical hex representation, including hyphens: `"5ce0e9a5-5ffa-654b-cee0-1238041fb31a"`
- `'hex'` - The compact hex representation of the UUID, not including hyphens: `"5ce0e9a55ffa654bcee01238041fb31a"`
- `'int'` - A 128 bit integer representation of the UUID: `"123456789012312313134124512351145145114"`
- `'urn'` - RFC 4122 URN representation of the UUID: `"urn:uuid:5ce0e9a5-5ffa-654b-cee0-1238041fb31a"`
* `format`: Determines the representation format of the uuid value
* `'hex_verbose'` - The canonical hex representation, including hyphens: `"5ce0e9a5-5ffa-654b-cee0-1238041fb31a"`
* `'hex'` - The compact hex representation of the UUID, not including hyphens: `"5ce0e9a55ffa654bcee01238041fb31a"`
* `'int'` - A 128 bit integer representation of the UUID: `"123456789012312313134124512351145145114"`
* `'urn'` - RFC 4122 URN representation of the UUID: `"urn:uuid:5ce0e9a5-5ffa-654b-cee0-1238041fb31a"`
Changing the `format` parameters only affects representation values. All formats are accepted by `to_internal_value`
## FilePathField
@ -237,11 +237,11 @@ Corresponds to `django.forms.fields.FilePathField`.
**Signature:** `FilePathField(path, match=None, recursive=False, allow_files=True, allow_folders=False, required=None, **kwargs)`
- `path` - The absolute filesystem path to a directory from which this FilePathField should get its choice.
- `match` - A regular expression, as a string, that FilePathField will use to filter filenames.
- `recursive` - Specifies whether all subdirectories of path should be included. Default is `False`.
- `allow_files` - Specifies whether files in the specified location should be included. Default is `True`. Either this or `allow_folders` must be `True`.
- `allow_folders` - Specifies whether folders in the specified location should be included. Default is `False`. Either this or `allow_files` must be `True`.
* `path` - The absolute filesystem path to a directory from which this FilePathField should get its choice.
* `match` - A regular expression, as a string, that FilePathField will use to filter filenames.
* `recursive` - Specifies whether all subdirectories of path should be included. Default is `False`.
* `allow_files` - Specifies whether files in the specified location should be included. Default is `True`. Either this or `allow_folders` must be `True`.
* `allow_folders` - Specifies whether folders in the specified location should be included. Default is `False`. Either this or `allow_files` must be `True`.
## IPAddressField
@ -251,8 +251,8 @@ Corresponds to `django.forms.fields.IPAddressField` and `django.forms.fields.Gen
**Signature**: `IPAddressField(protocol='both', unpack_ipv4=False, **options)`
- `protocol` Limits valid inputs to the specified protocol. Accepted values are 'both' (default), 'IPv4' or 'IPv6'. Matching is case insensitive.
- `unpack_ipv4` Unpacks IPv4 mapped addresses like ::ffff:192.0.2.1. If this option is enabled that address would be unpacked to 192.0.2.1. Default is disabled. Can only be used when protocol is set to 'both'.
* `protocol` Limits valid inputs to the specified protocol. Accepted values are 'both' (default), 'IPv4' or 'IPv6'. Matching is case insensitive.
* `unpack_ipv4` Unpacks IPv4 mapped addresses like ::ffff:192.0.2.1. If this option is enabled that address would be unpacked to 192.0.2.1. Default is disabled. Can only be used when protocol is set to 'both'.
---
@ -266,8 +266,8 @@ Corresponds to `django.db.models.fields.IntegerField`, `django.db.models.fields.
**Signature**: `IntegerField(max_value=None, min_value=None)`
- `max_value` Validate that the number provided is no greater than this value.
- `min_value` Validate that the number provided is no less than this value.
* `max_value` Validate that the number provided is no greater than this value.
* `min_value` Validate that the number provided is no less than this value.
## FloatField
@ -277,8 +277,8 @@ Corresponds to `django.db.models.fields.FloatField`.
**Signature**: `FloatField(max_value=None, min_value=None)`
- `max_value` Validate that the number provided is no greater than this value.
- `min_value` Validate that the number provided is no less than this value.
* `max_value` Validate that the number provided is no greater than this value.
* `min_value` Validate that the number provided is no less than this value.
## DecimalField
@ -288,13 +288,13 @@ Corresponds to `django.db.models.fields.DecimalField`.
**Signature**: `DecimalField(max_digits, decimal_places, coerce_to_string=None, max_value=None, min_value=None)`
- `max_digits` The maximum number of digits allowed in the number. It must be either `None` or an integer greater than or equal to `decimal_places`.
- `decimal_places` The number of decimal places to store with the number.
- `coerce_to_string` Set to `True` if string values should be returned for the representation, or `False` if `Decimal` objects should be returned. Defaults to the same value as the `COERCE_DECIMAL_TO_STRING` settings key, which will be `True` unless overridden. If `Decimal` objects are returned by the serializer, then the final output format will be determined by the renderer. Note that setting `localize` will force the value to `True`.
- `max_value` Validate that the number provided is no greater than this value.
- `min_value` Validate that the number provided is no less than this value.
- `localize` Set to `True` to enable localization of input and output based on the current locale. This will also force `coerce_to_string` to `True`. Defaults to `False`. Note that data formatting is enabled if you have set `USE_L10N=True` in your settings file.
- `rounding` Sets the rounding mode used when quantising to the configured precision. Valid values are [`decimal` module rounding modes][python-decimal-rounding-modes]. Defaults to `None`.
* `max_digits` The maximum number of digits allowed in the number. It must be either `None` or an integer greater than or equal to `decimal_places`.
* `decimal_places` The number of decimal places to store with the number.
* `coerce_to_string` Set to `True` if string values should be returned for the representation, or `False` if `Decimal` objects should be returned. Defaults to the same value as the `COERCE_DECIMAL_TO_STRING` settings key, which will be `True` unless overridden. If `Decimal` objects are returned by the serializer, then the final output format will be determined by the renderer. Note that setting `localize` will force the value to `True`.
* `max_value` Validate that the number provided is no greater than this value.
* `min_value` Validate that the number provided is no less than this value.
* `localize` Set to `True` to enable localization of input and output based on the current locale. This will also force `coerce_to_string` to `True`. Defaults to `False`. Note that data formatting is enabled if you have set `USE_L10N=True` in your settings file.
* `rounding` Sets the rounding mode used when quantising to the configured precision. Valid values are [`decimal` module rounding modes][python-decimal-rounding-modes]. Defaults to `None`.
#### Example usage
@ -380,8 +380,8 @@ The representation is a string following this format `'[DD] [HH:[MM:]]ss[.uuuuuu
**Signature:** `DurationField(max_value=None, min_value=None)`
- `max_value` Validate that the duration provided is no greater than this value.
- `min_value` Validate that the duration provided is no less than this value.
* `max_value` Validate that the duration provided is no greater than this value.
* `min_value` Validate that the duration provided is no less than this value.
---
@ -395,10 +395,10 @@ Used by `ModelSerializer` to automatically generate fields if the corresponding
**Signature:** `ChoiceField(choices)`
- `choices` - A list of valid values, or a list of `(key, display_name)` tuples.
- `allow_blank` - If set to `True` then the empty string should be considered a valid value. If set to `False` then the empty string is considered invalid and will raise a validation error. Defaults to `False`.
- `html_cutoff` - If set this will be the maximum number of choices that will be displayed by a HTML select drop down. Can be used to ensure that automatically generated ChoiceFields with very large possible selections do not prevent a template from rendering. Defaults to `None`.
- `html_cutoff_text` - If set this will display a textual indicator if the maximum number of items have been cutoff in an HTML select drop down. Defaults to `"More than {count} items…"`
* `choices` - A list of valid values, or a list of `(key, display_name)` tuples.
* `allow_blank` - If set to `True` then the empty string should be considered a valid value. If set to `False` then the empty string is considered invalid and will raise a validation error. Defaults to `False`.
* `html_cutoff` - If set this will be the maximum number of choices that will be displayed by a HTML select drop down. Can be used to ensure that automatically generated ChoiceFields with very large possible selections do not prevent a template from rendering. Defaults to `None`.
* `html_cutoff_text` - If set this will display a textual indicator if the maximum number of items have been cutoff in an HTML select drop down. Defaults to `"More than {count} items…"`
Both the `allow_blank` and `allow_null` are valid options on `ChoiceField`, although it is highly recommended that you only use one and not both. `allow_blank` should be preferred for textual choices, and `allow_null` should be preferred for numeric or other non-textual choices.
@ -408,10 +408,10 @@ A field that can accept a set of zero, one or many values, chosen from a limited
**Signature:** `MultipleChoiceField(choices)`
- `choices` - A list of valid values, or a list of `(key, display_name)` tuples.
- `allow_blank` - If set to `True` then the empty string should be considered a valid value. If set to `False` then the empty string is considered invalid and will raise a validation error. Defaults to `False`.
- `html_cutoff` - If set this will be the maximum number of choices that will be displayed by a HTML select drop down. Can be used to ensure that automatically generated ChoiceFields with very large possible selections do not prevent a template from rendering. Defaults to `None`.
- `html_cutoff_text` - If set this will display a textual indicator if the maximum number of items have been cutoff in an HTML select drop down. Defaults to `"More than {count} items…"`
* `choices` - A list of valid values, or a list of `(key, display_name)` tuples.
* `allow_blank` - If set to `True` then the empty string should be considered a valid value. If set to `False` then the empty string is considered invalid and will raise a validation error. Defaults to `False`.
* `html_cutoff` - If set this will be the maximum number of choices that will be displayed by a HTML select drop down. Can be used to ensure that automatically generated ChoiceFields with very large possible selections do not prevent a template from rendering. Defaults to `None`.
* `html_cutoff_text` - If set this will display a textual indicator if the maximum number of items have been cutoff in an HTML select drop down. Defaults to `"More than {count} items…"`
As with `ChoiceField`, both the `allow_blank` and `allow_null` options are valid, although it is highly recommended that you only use one and not both. `allow_blank` should be preferred for textual choices, and `allow_null` should be preferred for numeric or other non-textual choices.
@ -432,9 +432,9 @@ Corresponds to `django.forms.fields.FileField`.
**Signature:** `FileField(max_length=None, allow_empty_file=False, use_url=UPLOADED_FILES_USE_URL)`
- `max_length` - Designates the maximum length for the file name.
- `allow_empty_file` - Designates if empty files are allowed.
- `use_url` - If set to `True` then URL string values will be used for the output representation. If set to `False` then filename string values will be used for the output representation. Defaults to the value of the `UPLOADED_FILES_USE_URL` settings key, which is `True` unless set otherwise.
* `max_length` - Designates the maximum length for the file name.
* `allow_empty_file` - Designates if empty files are allowed.
* `use_url` - If set to `True` then URL string values will be used for the output representation. If set to `False` then filename string values will be used for the output representation. Defaults to the value of the `UPLOADED_FILES_USE_URL` settings key, which is `True` unless set otherwise.
## ImageField
@ -444,9 +444,9 @@ Corresponds to `django.forms.fields.ImageField`.
**Signature:** `ImageField(max_length=None, allow_empty_file=False, use_url=UPLOADED_FILES_USE_URL)`
- `max_length` - Designates the maximum length for the file name.
- `allow_empty_file` - Designates if empty files are allowed.
- `use_url` - If set to `True` then URL string values will be used for the output representation. If set to `False` then filename string values will be used for the output representation. Defaults to the value of the `UPLOADED_FILES_USE_URL` settings key, which is `True` unless set otherwise.
* `max_length` - Designates the maximum length for the file name.
* `allow_empty_file` - Designates if empty files are allowed.
* `use_url` - If set to `True` then URL string values will be used for the output representation. If set to `False` then filename string values will be used for the output representation. Defaults to the value of the `UPLOADED_FILES_USE_URL` settings key, which is `True` unless set otherwise.
Requires either the `Pillow` package or `PIL` package. The `Pillow` package is recommended, as `PIL` is no longer actively maintained.
@ -460,10 +460,10 @@ A field class that validates a list of objects.
**Signature**: `ListField(child=<A_FIELD_INSTANCE>, allow_empty=True, min_length=None, max_length=None)`
- `child` - A field instance that should be used for validating the objects in the list. If this argument is not provided then objects in the list will not be validated.
- `allow_empty` - Designates if empty lists are allowed.
- `min_length` - Validates that the list contains no fewer than this number of elements.
- `max_length` - Validates that the list contains no more than this number of elements.
* `child` - A field instance that should be used for validating the objects in the list. If this argument is not provided then objects in the list will not be validated.
* `allow_empty` - Designates if empty lists are allowed.
* `min_length` - Validates that the list contains no fewer than this number of elements.
* `max_length` - Validates that the list contains no more than this number of elements.
For example, to validate a list of integers you might use something like the following:
@ -484,8 +484,8 @@ A field class that validates a dictionary of objects. The keys in `DictField` ar
**Signature**: `DictField(child=<A_FIELD_INSTANCE>, allow_empty=True)`
- `child` - A field instance that should be used for validating the values in the dictionary. If this argument is not provided then values in the mapping will not be validated.
- `allow_empty` - Designates if empty dictionaries are allowed.
* `child` - A field instance that should be used for validating the values in the dictionary. If this argument is not provided then values in the mapping will not be validated.
* `allow_empty` - Designates if empty dictionaries are allowed.
For example, to create a field that validates a mapping of strings to strings, you would write something like this:
@ -502,8 +502,8 @@ A preconfigured `DictField` that is compatible with Django's postgres `HStoreFie
**Signature**: `HStoreField(child=<A_FIELD_INSTANCE>, allow_empty=True)`
- `child` - A field instance that is used for validating the values in the dictionary. The default child field accepts both empty strings and null values.
- `allow_empty` - Designates if empty dictionaries are allowed.
* `child` - A field instance that is used for validating the values in the dictionary. The default child field accepts both empty strings and null values.
* `allow_empty` - Designates if empty dictionaries are allowed.
Note that the child field **must** be an instance of `CharField`, as the hstore extension stores values as strings.
@ -513,8 +513,8 @@ A field class that validates that the incoming data structure consists of valid
**Signature**: `JSONField(binary, encoder)`
- `binary` - If set to `True` then the field will output and validate a JSON encoded string, rather than a primitive data structure. Defaults to `False`.
- `encoder` - Use this JSON encoder to serialize input object. Defaults to `None`.
* `binary` - If set to `True` then the field will output and validate a JSON encoded string, rather than a primitive data structure. Defaults to `False`.
* `encoder` - Use this JSON encoder to serialize input object. Defaults to `None`.
---
@ -565,7 +565,7 @@ This is a read-only field. It gets its value by calling a method on the serializ
**Signature**: `SerializerMethodField(method_name=None)`
- `method_name` - The name of the method on the serializer to be called. If not included this defaults to `get_<field_name>`.
* `method_name` - The name of the method on the serializer to be called. If not included this defaults to `get_<field_name>`.
The serializer method referred to by the `method_name` argument should accept a single argument (in addition to `self`), which is the object being serialized. It should return whatever you want to be included in the serialized representation of the object. For example:

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@ -33,7 +33,7 @@ For example, the following serializer would lead to a database hit each time eva
class Meta:
model = Album
fields = ['album_name', 'artist', 'tracks']
# For each album object, tracks should be fetched from database
qs = Album.objects.all()
print(AlbumSerializer(qs, many=True).data)
@ -278,7 +278,7 @@ This field is always read-only.
As opposed to previously discussed _references_ to another entity, the referred entity can instead also be embedded or _nested_
in the representation of the object that refers to it.
Such nested relationships can be expressed by using serializers as fields.
Such nested relationships can be expressed by using serializers as fields.
If the field is used to represent a to-many relationship, you should add the `many=True` flag to the serializer field.
@ -494,8 +494,8 @@ This behavior is intended to prevent a template from being unable to render in a
There are two keyword arguments you can use to control this behavior:
- `html_cutoff` - If set this will be the maximum number of choices that will be displayed by a HTML select drop down. Set to `None` to disable any limiting. Defaults to `1000`.
- `html_cutoff_text` - If set this will display a textual indicator if the maximum number of items have been cutoff in an HTML select drop down. Defaults to `"More than {count} items…"`
* `html_cutoff` - If set this will be the maximum number of choices that will be displayed by a HTML select drop down. Set to `None` to disable any limiting. Defaults to `1000`.
* `html_cutoff_text` - If set this will display a textual indicator if the maximum number of items have been cutoff in an HTML select drop down. Defaults to `"More than {count} items…"`
You can also control these globally using the settings `HTML_SELECT_CUTOFF` and `HTML_SELECT_CUTOFF_TEXT`.