entry_collections¶
EntryCollection
¶
Bases: ABC
Backend-agnostic base class for querying collections of
EntryResource
s.
Source code in optimade/server/entry_collections/entry_collections.py
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all_fields: set[str]
property
¶
Get the set of all fields handled in this collection, from attribute fields in the schema, provider fields and top-level OPTIMADE fields.
The set of all fields are lazily created and then cached. This means the set is created the first time the property is requested and then cached.
Returns:
Type | Description |
---|---|
set[str]
|
All fields handled in this collection. |
pagination_mechanism = PaginationMechanism('page_offset')
class-attribute
instance-attribute
¶
The default pagination mechansim to use with a given collection, if the user does not provide any pagination query parameters.
__init__(resource_cls, resource_mapper, transformer)
¶
Initialize the collection for the given parameters.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
resource_cls |
EntryResource
|
The |
required |
resource_mapper |
BaseResourceMapper
|
A resource mapper object that handles aliases and format changes between deserialization and response. |
required |
transformer |
Transformer
|
The Lark |
required |
Source code in optimade/server/entry_collections/entry_collections.py
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__len__()
abstractmethod
¶
Returns the total number of entries in the collection.
Source code in optimade/server/entry_collections/entry_collections.py
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count(**kwargs)
abstractmethod
¶
Returns the number of entries matching the query specified by the keyword arguments.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
**kwargs |
Any
|
Query parameters as keyword arguments. |
{}
|
Source code in optimade/server/entry_collections/entry_collections.py
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find(params)
¶
Fetches results and indicates if more data is available.
Also gives the total number of data available in the absence of page_limit
.
See EntryListingQueryParams
for more information.
Returns a list of the mapped database reponse.
If no results match the query, then results
is set to None
.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
params |
Union[EntryListingQueryParams, SingleEntryQueryParams]
|
Entry listing URL query params. |
required |
Returns:
Type | Description |
---|---|
Optional[Union[dict[str, Any], list[dict[str, Any]]]]
|
A tuple of various relevant values: |
Optional[int]
|
( |
Source code in optimade/server/entry_collections/entry_collections.py
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get_attribute_fields()
¶
Get the set of attribute fields
Return only the first-level attribute fields from the schema of the resource class, resolving references along the way if needed.
Note
It is not needed to take care of other special OpenAPI schema keys than allOf
,
since only allOf
will be found in this context.
Other special keys can be found in the Swagger documentation.
Returns:
Type | Description |
---|---|
set[str]
|
Property names. |
Source code in optimade/server/entry_collections/entry_collections.py
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get_next_query_params(params, results)
¶
Provides url query pagination parameters that will be used in the next link.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
results |
Optional[Union[dict[str, Any], list[dict[str, Any]]]]
|
The results produced by find. |
required |
params |
EntryListingQueryParams
|
The parsed request params produced by handle_query_params. |
required |
Returns:
Type | Description |
---|---|
dict[str, list[str]]
|
A dictionary with the necessary query parameters. |
Source code in optimade/server/entry_collections/entry_collections.py
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handle_query_params(params)
¶
Parse and interpret the backend-agnostic query parameter models into a dictionary that can be used by the specific backend.
Note
Currently this method returns the pymongo interpretation of the parameters, which will need modification for modified for other backends.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
params |
Union[EntryListingQueryParams, SingleEntryQueryParams]
|
The initialized query parameter model from the server. |
required |
Raises:
Type | Description |
---|---|
Forbidden
|
If too large of a page limit is provided. |
BadRequest
|
If an invalid request is made, e.g., with incorrect fields or response format. |
Returns:
Type | Description |
---|---|
dict[str, Any]
|
A dictionary representation of the query parameters. |
Source code in optimade/server/entry_collections/entry_collections.py
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insert(data)
abstractmethod
¶
Add the given entries to the underlying database.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
data |
list[EntryResource]
|
The entry resource objects to add to the database. |
required |
Source code in optimade/server/entry_collections/entry_collections.py
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parse_sort_params(sort_params)
¶
Handles any sort parameters passed to the collection, resolving aliases and dealing with any invalid fields.
Raises:
Type | Description |
---|---|
BadRequest
|
if an invalid sort is requested. |
Returns:
Type | Description |
---|---|
Iterable[tuple[str, int]]
|
A list of tuples containing the aliased field name and |
Iterable[tuple[str, int]]
|
sort direction encoded as 1 (ascending) or -1 (descending). |
Source code in optimade/server/entry_collections/entry_collections.py
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PaginationMechanism
¶
Bases: Enum
The supported pagination mechanisms.
Source code in optimade/server/entry_collections/entry_collections.py
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create_collection(name, resource_cls, resource_mapper)
¶
Create an EntryCollection
of the configured type, depending on the value of
CONFIG.database_backend
.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
name |
str
|
The collection name. |
required |
resource_cls |
type[EntryResource]
|
The type of entry resource to be stored within the collection. |
required |
resource_mapper |
type[BaseResourceMapper]
|
The associated resource mapper for that entry resource type. |
required |
Returns:
Type | Description |
---|---|
EntryCollection
|
The created |
Source code in optimade/server/entry_collections/entry_collections.py
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