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parameter.py
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from typing import Any, Dict, Optional, Union
from pydantic import BaseModel, Field
from .example import Example
from .media_type import MediaType
from .reference import Reference
from .schema import Schema
class Parameter(BaseModel):
"""
Describes a single operation parameter.
A unique parameter is defined by a combination of a [name](#parameterName) and [location](#parameterIn).
"""
"""Fixed Fields"""
name: str
"""
**REQUIRED**. The name of the parameter.
Parameter names are *case sensitive*.
- If [`in`](#parameterIn) is `"path"`, the `name` field MUST correspond to a template expression occurring
within the [path](#pathsPath) field in the [Paths Object](#pathsObject).
See [Path Templating](#pathTemplating) for further information.
- If [`in`](#parameterIn) is `"header"` and the `name` field is `"Accept"`, `"Content-Type"` or `"Authorization"`.
the parameter definition SHALL be ignored.
- For all other cases, the `name` corresponds to the parameter name used by the [`in`](#parameterIn) property.
"""
param_in: str = Field(alias="in")
"""
**REQUIRED**. The location of the parameter. Possible values are `"query"`, `"header"`, `"path"` or `"cookie"`.
"""
description: Optional[str] = None
"""
A brief description of the parameter.
This could contain examples of use.
[CommonMark syntax](https://spec.commonmark.org/) MAY be used for rich text representation.
"""
required: bool = False
"""
Determines whether this parameter is mandatory.
If the [parameter location](#parameterIn) is `"path"`, this property is **REQUIRED** and its value MUST be `true`.
Otherwise, the property MAY be included and its default value is `false`.
"""
deprecated: bool = False
"""
Specifies that a parameter is deprecated and SHOULD be transitioned out of usage.
Default value is `false`.
"""
allowEmptyValue: bool = False
"""
Sets the ability to pass empty-valued parameters.
This is valid only for `query` parameters and allows sending a parameter with an empty value.
Default value is `false`.
If [`style`](#parameterStyle) is used, and if behavior is `n/a` (cannot be serialized),
the value of `allowEmptyValue` SHALL be ignored.
Use of this property is NOT RECOMMENDED, as it is likely to be removed in a later revision.
"""
"""
The rules for serialization of the parameter are specified in one of two ways.
For simpler scenarios, a [`schema`](#parameterSchema) and [`style`](#parameterStyle)
can describe the structure and syntax of the parameter.
"""
style: Optional[str] = None
"""
Describes how the parameter value will be serialized depending on the type of the parameter value.
Default values (based on value of `in`):
- for `query` - `form`;
- for `path` - `simple`;
- for `header` - `simple`;
- for `cookie` - `form`.
"""
explode: bool = False
"""
When this is true, parameter values of type `array` or `object` generate separate parameters
for each value of the array or key-value pair of the map.
For other types of parameters this property has no effect.
When [`style`](#parameterStyle) is `form`, the default value is `true`.
For all other styles, the default value is `false`.
"""
allowReserved: bool = False
"""
Determines whether the parameter value SHOULD allow reserved characters,
as defined by [RFC3986](https://tools.ietf.org/html/rfc3986#section-2.2)
`:/?#[]@!$&'()*+,;=` to be included without percent-encoding.
This property only applies to parameters with an `in` value of `query`.
The default value is `false`.
"""
param_schema: Optional[Union[Reference, Schema]] = Field(default=None, alias="schema")
"""
The schema defining the type used for the parameter.
"""
example: Optional[Any] = None
"""
Example of the parameter's potential value.
The example SHOULD match the specified schema and encoding properties if present.
The `example` field is mutually exclusive of the `examples` field.
Furthermore, if referencing a `schema` that contains an example,
the `example` value SHALL _override_ the example provided by the schema.
To represent examples of media types that cannot naturally be represented in JSON or YAML,
a string value can contain the example with escaping where necessary.
"""
examples: Optional[Dict[str, Union[Example, Reference]]] = None
"""
Examples of the parameter's potential value.
Each example SHOULD contain a value in the correct format as specified in the parameter encoding.
The `examples` field is mutually exclusive of the `example` field.
Furthermore, if referencing a `schema` that contains an example,
the `examples` value SHALL _override_ the example provided by the schema.
"""
"""
For more complex scenarios, the [`content`](#parameterContent) property
can define the media type and schema of the parameter.
A parameter MUST contain either a `schema` property, or a `content` property, but not both.
When `example` or `examples` are provided in conjunction with the `schema` object,
the example MUST follow the prescribed serialization strategy for the parameter.
"""
content: Optional[Dict[str, MediaType]] = None
"""
A map containing the representations for the parameter.
The key is the media type and the value describes it.
The map MUST only contain one entry.
"""
class Config:
allow_population_by_field_name = True
schema_extra = {
"examples": [
{
"name": "token",
"in": "header",
"description": "token to be passed as a header",
"required": True,
"schema": {"type": "array", "items": {"type": "integer", "format": "int64"}},
"style": "simple",
},
{
"name": "username",
"in": "path",
"description": "username to fetch",
"required": True,
"schema": {"type": "string"},
},
{
"name": "id",
"in": "query",
"description": "ID of the object to fetch",
"required": False,
"schema": {"type": "array", "items": {"type": "string"}},
"style": "form",
"explode": True,
},
{
"in": "query",
"name": "freeForm",
"schema": {"type": "object", "additionalProperties": {"type": "integer"}},
"style": "form",
},
{
"in": "query",
"name": "coordinates",
"content": {
"application/json": {
"schema": {
"type": "object",
"required": ["lat", "long"],
"properties": {"lat": {"type": "number"}, "long": {"type": "number"}},
}
}
},
},
]
}