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documents: optimize availability
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- Uses Elasticsearch to compute the documents, items and holdings availability.
- Search only one organisation when an organisation is retrived using a view code.
- Renames the available property for items and holdings into a `is_available` method.

Co-Authored-by: Johnny Mariéthoz <[email protected]>
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jma committed Sep 27, 2023
1 parent ad8bde7 commit 8bbc162
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Showing 16 changed files with 295 additions and 108 deletions.
1 change: 0 additions & 1 deletion pyproject.toml
Original file line number Diff line number Diff line change
Expand Up @@ -165,7 +165,6 @@ documents = "rero_ils.modules.documents.api_views:api_blueprint"
circ_policies = "rero_ils.modules.circ_policies.views:blueprint"
local_entities = "rero_ils.modules.entities.local_entities.views:api_blueprint"
remote_entities = "rero_ils.modules.entities.remote_entities.views:api_blueprint"
documents = "rero_ils.modules.documents.views:api_blueprint"
holdings = "rero_ils.modules.holdings.api_views:api_blueprint"
imports = "rero_ils.modules.imports.views:api_blueprint"
item_types = "rero_ils.modules.item_types.views:blueprint"
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136 changes: 117 additions & 19 deletions rero_ils/modules/documents/api.py
Original file line number Diff line number Diff line change
Expand Up @@ -161,27 +161,125 @@ def _validate(self, **kwargs):
return json

@classmethod
def is_available(cls, pid, view_code, raise_exception=False):
"""Get availability for document."""
from ..holdings.api import Holding
def get_n_available_holdings(cls, pid, org_pid=None):
"""Get the number of available and electronic holdings.
:param pid: str - the document pid.
:param org_pid: str - the organisation pid.
:returns: int, int - the number of available and electronic holdings.
"""
from rero_ils.modules.holdings.api import HoldingsSearch

# create the holding search query
holding_query = HoldingsSearch().available_query()

# filter by the current document
filters = Q('term', document__pid=pid)

# filter by organisation
if org_pid:
filters &= Q('term', organisation__pid=org_pid)
holding_query = holding_query.filter(filters)

# get the number of electronic holdings
n_electronic_holdings = holding_query\
.filter('term', holdings_type='electronic')

return holding_query.count(), n_electronic_holdings.count()

@classmethod
def get_available_item_pids(cls, pid, org_pid=None):
"""Get the list of the available item pids.
:param pid: str - the document pid.
:param org_pid: str - the organisation pid.
:returns: [str] - the list of the available item pids.
"""
from rero_ils.modules.items.api import ItemsSearch

# create the item query
items_query = ItemsSearch().available_query()

# filter by the current document
filters = Q('term', document__pid=pid)

# filter by organisation
if org_pid:
filters &= Q('term', organisation__pid=org_pid)

return [
hit.pid for hit in items_query.filter(filters).source('pid').scan()
]

@classmethod
def get_item_pids_with_active_loan(cls, pid, org_pid=None):
"""Get the list of items pids that have active loans.
:param pid: str - the document pid.
:param org_pid: str - the organisation pid.
:returns: [str] - the list of the item pids having active loans.
"""
from rero_ils.modules.loans.api import LoansSearch

loan_query = LoansSearch().unavailable_query()

# filter by the current document
filters = Q('term', document_pid=pid)

# filter by organisation
if org_pid:
filters &= Q('term', organisation__pid=org_pid)

loan_query = loan_query.filter(filters)

return [
hit.item_pid.value for hit in loan_query.source('item_pid').scan()
]

@classmethod
def is_available(cls, pid, view_code=None):
"""Get availability for document.
Note: if the logic has to be changed here please check also for items
and holdings availability.
:param pid: str - document pid value.
:param view_code: str - the view code.
"""
# get the organisation pid corresponding to the view code
org_pid = None
if view_code != current_app.config.get(
'RERO_ILS_SEARCH_GLOBAL_VIEW_CODE'):
view_id = Organisation.get_record_by_viewcode(view_code)['pid']
holding_pids = Holding.get_holdings_pid_by_document_pid_by_org(
pid, view_id)
else:
holding_pids = Holding.get_holdings_pid_by_document_pid(pid)
for holding_pid in holding_pids:
if holding := Holding.get_record_by_pid(holding_pid):
if holding.available:
return True
else:
msg = f'No holding: {holding_pid} in DB ' \
f'for document: {pid}'
current_app.logger.error(msg)
if raise_exception:
raise ValueError(msg)
return False
org_pid = Organisation.get_record_by_viewcode(view_code)['pid']

# -------------- Holdings --------------------
# get the number of available and electronic holdings
n_available_holdings, n_electronic_holdings = \
cls.get_n_available_holdings(pid, org_pid)

# available if an electronic holding exists
if n_electronic_holdings:
return True

# unavailable if no holdings exists
if not n_available_holdings:
return False

# -------------- Items --------------------
# get the available item pids
available_item_pids = cls.get_available_item_pids(pid, org_pid)

# unavailable if no items exists
if not available_item_pids:
return False

# --------------- Loans -------------------
# get item pids that have active loans
unavailable_item_pids = \
cls.get_item_pids_with_active_loan(pid, org_pid)

# available if at least one item don't have active loan
return bool(set(available_item_pids) - set(unavailable_item_pids))

@property
def harvested(self):
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6 changes: 2 additions & 4 deletions rero_ils/modules/documents/views.py
Original file line number Diff line number Diff line change
Expand Up @@ -24,9 +24,7 @@

import click
from elasticsearch_dsl.query import Q
from flask import Blueprint, current_app, render_template
from flask import url_for
from flask import Blueprint, current_app, render_template
from flask import Blueprint, current_app, render_template, url_for
from flask_babelex import gettext as _
from flask_login import current_user
from invenio_records_ui.signals import record_viewed
Expand All @@ -41,7 +39,7 @@
from rero_ils.modules.locations.api import Location
from rero_ils.modules.organisations.api import Organisation
from rero_ils.modules.patrons.api import current_patrons
from rero_ils.modules.utils import cached, extracted_data_from_ref
from rero_ils.modules.utils import extracted_data_from_ref

from .api import Document, DocumentsSearch
from .extensions import EditionStatementExtension, \
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77 changes: 64 additions & 13 deletions rero_ils/modules/holdings/api.py
Original file line number Diff line number Diff line change
Expand Up @@ -84,6 +84,14 @@ class Meta:

default_filter = None

def available_query(self):
"""Base query for holding availability.
:returns: a filtered Elasticsearch query.
"""
# should not masked
return self.exclude('term', _masked=True)


class Holding(IlsRecord):
"""Holding class."""
Expand Down Expand Up @@ -260,14 +268,65 @@ def vendor(self):
if self.get('vendor'):
return extracted_data_from_ref(self.get('vendor'), data='record')

@property
def available(self):
"""Get availability for holding."""
def get_available_item_pids(self):
"""Get the list of the available item pids.
:returns: [str] - the list of the available item pids.
"""
from rero_ils.modules.items.api import ItemsSearch
items_query = ItemsSearch().available_query()
filters = Q('term', holding__pid=self.pid)
return [
hit.pid for hit in items_query.filter(filters).source('pid').scan()
]

def get_item_pids_with_active_loan(self, item_pids):
"""Get the list of items pids that have active loans.
:param item_pids: [str] - the list of the item pids.
:returns: the list of the item pids having active loans.
"""
from rero_ils.modules.loans.api import LoansSearch

loan_query = LoansSearch().unavailable_query()

# the loans corresponding to the given item pids
loan_query = loan_query.filter(Q('terms', item_pid__value=item_pids))

return [
hit.item_pid.value for hit in loan_query.source('item_pid').scan()
]

def is_available(self):
"""Get availability for the current holding.
Note: if the logic has to be changed here please check also for items
and documents availability.
"""
# -------------- Holdings --------------------
# unavailable if masked
if self.get('_masked', False):
return False

# available if the holding is electronic
if self.is_electronic:
return True
if self.get('_masked', False):

# -------------- Items --------------------
# get available item pids
available_item_pids = self.get_available_item_pids()

# unavailable if no item exists
if not available_item_pids:
return False
return self._exists_available_child()

# --------------- Loans -------------------
# get item pids that have active loans
unavailable_item_pids = \
self.get_item_pids_with_active_loan(available_item_pids)

# available if at least one item don't have active loan
return bool(set(available_item_pids) - set(unavailable_item_pids))

@property
def max_number_of_claims(self):
Expand Down Expand Up @@ -303,14 +362,6 @@ def get_note(self, note_type):
if note.get('type') == note_type]
return next(iter(notes), None)

def _exists_available_child(self):
"""Check if at least one child of this holding is available."""
for pid in Item.get_items_pid_by_holding_pid(self.pid):
item = Item.get_record_by_pid(pid)
if item.available:
return True
return False

@property
def get_items_count_by_holding_pid(self):
"""Returns items count from holding pid."""
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2 changes: 1 addition & 1 deletion rero_ils/modules/holdings/api_views.py
Original file line number Diff line number Diff line change
Expand Up @@ -315,6 +315,6 @@ def holding_availability(pid):
"""HTTP GET request for holding availability."""
if holding := Holding.get_record_by_pid(pid):
return jsonify({
'available': holding.available
'available': holding.is_available()
})
abort(404)
33 changes: 33 additions & 0 deletions rero_ils/modules/items/api/api.py
Original file line number Diff line number Diff line change
Expand Up @@ -21,12 +21,14 @@
from functools import partial

from elasticsearch.exceptions import NotFoundError
from elasticsearch_dsl import Q
from invenio_search import current_search_client

from rero_ils.modules.api import IlsRecordError, IlsRecordsIndexer, \
IlsRecordsSearch
from rero_ils.modules.documents.api import DocumentsSearch
from rero_ils.modules.fetchers import id_fetcher
from rero_ils.modules.item_types.api import ItemTypesSearch
from rero_ils.modules.minters import id_minter
from rero_ils.modules.organisations.api import Organisation
from rero_ils.modules.patrons.api import current_librarian
Expand Down Expand Up @@ -62,6 +64,37 @@ class Meta:

default_filter = None

def available_query(self):
"""Base elasticsearch query to compute availability.
:returns: elasticsearch query.
"""
must_not_filters = [
# should not be masked
Q('term', _masked=True),
# if issue the status should be received
Q('exists', field='issue') & ~Q('term', issue__status='received')
]

# negative availability item types
not_available_item_types = [
hit.pid for hit in ItemTypesSearch()
.source('pid')
.filter('term', negative_availability=True)
.scan()
]
if not_available_item_types:
# negative availability item type and not temporary item types
has_items_filters = \
Q('terms', item_type__pid=not_available_item_types)
has_items_filters &= ~Q('exists', field='temporary_item_type')
# temporary item types with negative availability
has_items_filters |= Q(
'terms', temporary_item_type__pid=not_available_item_types)
# add to the must not filters
must_not_filters.append(has_items_filters)
return self.filter(Q('bool', must_not=must_not_filters))


class Item(ItemCirculation, ItemIssue):
"""Item class."""
Expand Down
29 changes: 13 additions & 16 deletions rero_ils/modules/items/api/circulation.py
Original file line number Diff line number Diff line change
Expand Up @@ -1276,26 +1276,23 @@ def get_loan_states_for_an_item(self):
]).params(preserve_order=True).source(['state'])
return list(dict.fromkeys([result.state for result in search.scan()]))

@property
def available(self):
def is_available(self):
"""Get availability for item.
An item is 'available' if there are no related request/active_loan and
if the related circulation category doesn't specify a negative
availability.
All masked items are considered as unavailable.
Note: if the logic has to be changed here please check also for
documents and holdings availability.
"""
if self.get('_masked', False):
return False
if self.circulation_category.get('negative_availability'):
return False
if self.temp_item_type_negative_availability:
return False
if self.is_issue and self.issue_status != ItemIssueStatus.RECEIVED:
return False
if self.item_has_active_loan_or_request() > 0:
from ..api import ItemsSearch

items_query = ItemsSearch().available_query()

# check item availability
if not items_query.filter('term', pid=self.pid).count():
return False
return True

# --------------- Loans -------------------
# unavailable if the current item has active loans
return not self.item_has_active_loan_or_request()

@property
def availability_text(self):
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2 changes: 1 addition & 1 deletion rero_ils/modules/items/utils.py
Original file line number Diff line number Diff line change
Expand Up @@ -89,7 +89,7 @@ def exists_available_item(items=None):
item = Item.get_record_by_pid(item)
if not isinstance(item, Item):
raise ValueError('All items should be Item resource.')
if item.available:
if item.is_available():
return True
return False

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2 changes: 1 addition & 1 deletion rero_ils/modules/items/views/api_views.py
Original file line number Diff line number Diff line change
Expand Up @@ -472,7 +472,7 @@ def item_availability(pid):
item = Item.get_record_by_pid(pid)
if not item:
abort(404)
data = dict(available=item.available)
data = dict(available=item.is_available())
if flask_request.args.get('more_info'):
extra = {
'status': item['status'],
Expand Down
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