oarepo-vocabularies 6.0.0

Support for custom fields and hierarchy on Invenio vocabularies

OARepo Vocabularies

Enhanced Invenio-Vocabularies extension providing hierarchical vocabulary support, custom fields integration, and advanced permission controls for vocabulary management in Invenio-based repositories.

Features

• Hierarchical Vocabularies: Parent-child relationships with automatic level tracking, ancestor chains, and leaf detection
• Custom Fields: Extend vocabulary records with custom metadata fields using Invenio custom fields system
• Advanced Permissions: Fine-grained vocabulary-type-specific permission policies with dangerous operation detection
• Multi-language Support: ICU collation support for sorting and suggestions across multiple languages
• UI Components: Complete UI resource layer with search, detail, edit, and create views
• API Extensions: REST API endpoints for vocabulary types and hierarchy operations

Installation

pip install oarepo-vocabularies

Configuration

Add to invenio.cfg:

from oarepo_vocabularies.services.config import VocabulariesConfig
from oarepo_vocabularies.resources.config import VocabulariesResourceConfig

VOCABULARIES_SERVICE_CONFIG = VocabulariesConfig
VOCABULARIES_RESOURCE_CONFIG = VocabulariesResourceConfig

Core Components

Vocabulary Record Model

The Vocabulary record class extends invenio_vocabularies.records.api.Vocabulary:

• System Fields:

  • hierarchy: HierarchySystemField - manages hierarchy metadata (level, titles, ancestors, leaf status)
  • parent: ParentSystemField - handles parent-child relationships
  • custom_fields: DictField - stores custom metadata
  • relations: MultiRelationsField - manages parent and custom field relations

• Hierarchy Database Model (VocabularyHierarchy):

  • id: UUID reference to vocabulary metadata
  • parent_id: UUID reference to parent hierarchy record
  • pid: String PID of the vocabulary term
  • level: Integer depth in hierarchy (1 for root)
  • titles: JSON array of title objects in hierarchy order
  • ancestors: JSON array of ancestor PIDs (parent to root)
  • ancestors_or_self: JSON array including self PID
  • leaf: Boolean indicating if term has children

Hierarchy Operations

Automatic Hierarchy Management:

• On record creation: sets level, initializes ancestors, marks parent as non-leaf
• On parent change: updates entire descendant subtree, fixes previous parent leaf status
• On deletion: validates no children exist, updates parent leaf status

Query Methods:

# Get direct children
VocabularyHierarchy.get_direct_subterms_ids(parent_id)

# Get all descendants (recursive)
VocabularyHierarchy.get_subterms_ids(parent_id)

# Access from record
record.hierarchy.query_subterms()        # direct children
record.hierarchy.query_descendants()     # all descendants

Hierarchy Properties:

record.hierarchy.level              # depth in tree
record.hierarchy.leaf               # has no children
record.hierarchy.titles             # [self_title, parent_title, ...]
record.hierarchy.ancestors_ids      # ['parent', 'grandparent', ...]
record.hierarchy.parent_id          # direct parent PID

Parent Management

Setting Parent:

# On creation
data = {
    "id": "eng.US",
    "title": {"en": "English (US)"},
    "parent": {"id": "eng"},
    "type": "languages"
}
vocab = Vocabulary.create(data=data)

# On update
record.parent.set("new_parent_id")  # or None to remove
record.commit()

Constraints:

• Cannot delete record with children (raises ValidationError)
• Cannot create cycles (parent cannot be descendant)
• Parent change triggers full descendant tree update

Custom Fields

Configuration:

from invenio_records_resources.services.custom_fields import TextCF

VOCABULARIES_CF = [
    TextCF(name="blah"),
    # ... other custom fields
]

Usage:

vocab_service.create(
    system_identity,
    {
        "id": "eng",
        "title": {"en": "English"},
        "type": "languages",
        "custom_fields": {"blah": "Hello"}
    }
)

Services

VocabulariesConfig (oarepo_vocabularies.services.config.VocabulariesConfig):

• Extends invenio_vocabularies.services.VocabulariesServiceConfig
• Adds KeepVocabularyIdComponent - prevents ID changes on update
• Adds ScanningOrderComponent - manages vocabulary ordering
• Schema: VocabularySchema with hierarchy and custom_fields support
• Search: VocabularySearchOptions with hierarchy filters

VocabularyTypeService (oarepo_vocabularies.services.service.VocabularyTypeService):

• Lists available vocabulary types with metadata
• Aggregates term counts per vocabulary type
• Provides links to vocabulary listings

Service Components:

• KeepVocabularyIdComponent: Ensures vocabulary ID remains constant during updates
• ScanningOrderComponent: Handles vocabulary item ordering logic

Search Options

VocabularySearchOptions parameters:

• type: vocabulary type filter
• h-level: filter by hierarchy level
• h-parent: filter by direct parent PID
• h-ancestor: filter by any ancestor PID
• h-ancestor-or-self: filter including self
• tags: filter by tags
• updated_after: filter by update timestamp
• ids: list of (type, id) tuples for specific records
• source: specify returned fields

Sort Options:

• bestmatch: relevance score (default for queries)
• title: alphabetical by title (language-aware)
• newest: most recently created first
• oldest: creation date ascending

Query Parser:

• Boosts matches in current language (10x for title, 5x for hierarchy titles)
• Default operator: AND

Resources

VocabulariesResourceConfig:

• Extends invenio_vocabularies.resources.config.VocabulariesResourceConfig
• Adds hierarchy search parameters (h-parent, h-ancestor, h-level)
• Adds UI JSON serializer (application/vnd.inveniordm.v1+json)

Vocabulary Type Resource:

• Endpoint: /api/vocabularies/
• Lists available vocabulary types with counts
• Returns configured metadata (name, description, icons)

API Links (generated for each vocabulary):

• self: API detail endpoint
• self_html: UI detail page
• vocabulary: API list for vocabulary type
• vocabulary_html: UI search page
• edit_html: UI edit form
• parent: parent record (if exists)
• parent_html: parent UI page
• children: API list of direct children
• children_html: UI list of children
• descendants: API list of all descendants
• descendants_html: UI list of descendants

Permissions

Permission Generators:

IfVocabularyType(vocabulary_type, then_, else_):

• Conditional permission based on vocabulary type
• Example: Allow all users to manage "languages" but restrict "countries"

can_create = [
    IfVocabularyType("languages", then_=[AnyUser()], else_=[])
]

IfNonDangerousVocabularyOperation(then_, else_):

• Detects dangerous operations (ID change, parent change)
• Example: Allow custom field updates but restrict hierarchy changes

can_update = [
    IfNonDangerousVocabularyOperation(then_=[AnyUser()], else_=[Admin()])
]

Configuration:

from invenio_vocabularies.services.permissions import PermissionPolicy

# Set custom permission policy
VOCABULARIES_PERMISSIONS_POLICY = MyCustomPermissionPolicy

# Or use presets
OAREPO_PERMISSIONS_PRESETS = {
    "vocabularies": PermissionPolicy
}

Dangerous Operations:

• Changing vocabulary id field
• Changing hierarchy parent (adding/removing/changing)

UI Views

Blueprints:

• oarepo_vocabularies_ui: main vocabulary UI (search, detail, edit, create)
• oarepo_vocabulary_type_ui: vocabulary type listing UI

UI Components:

• VocabularyTypeAndProps: provides vocabulary type metadata to templates
• DepositVocabularyOptionsComponent: vocabulary selector for deposits

Templates:

• Search results page with hierarchy breadcrumbs
• Detail page showing hierarchy position
• Edit form with parent selector
• Create form with vocabulary type selection

CLI Commands

# Vocabulary management (extensible)
invenio oarepo vocabularies --help

Configuration Options

# Permission policy factory
VOCABULARIES_PERMISSIONS_POLICY = "path.to.PermissionPolicy"

# Vocabulary type metadata
INVENIO_VOCABULARY_TYPE_METADATA = {
    "languages": {
        "name": {"en": "Languages", "cs": "Jazyky"},
        "description": {"en": "Language vocabulary", "cs": "Slovník jazyků"},
        # ... additional metadata
    }
}

# Custom fields definition
VOCABULARIES_CF = [
    TextCF(name="custom_field_1"),
    # ...
]

# Sort/suggest custom fields
OAREPO_VOCABULARIES_SORT_CF = ["field1", "field2"]
OAREPO_VOCABULARIES_SUGGEST_CF = ["field1"]

# Cache settings for facets
VOCABULARIES_FACET_CACHE_SIZE = 2048
VOCABULARIES_FACET_CACHE_TTL = 60 * 60 * 24  # 24 hours

# Service/resource overrides
OAREPO_VOCABULARY_TYPE_SERVICE = VocabularyTypeService
OAREPO_VOCABULARY_TYPE_SERVICE_CONFIG = VocabularyTypeServiceConfig
OAREPO_VOCABULARY_TYPE_RESOURCE = VocabularyTypeResource
OAREPO_VOCABULARY_TYPE_RESOURCE_CONFIG = VocabularyTypeResourceConfig

API Examples

Create Hierarchical Vocabulary

from invenio_access.permissions import system_identity
from invenio_vocabularies.proxies import current_service as vocab_service

# Create parent
parent = vocab_service.create(
    system_identity,
    {
        "id": "eng",
        "title": {"en": "English"},
        "type": "languages"
    }
)

# Create child
child = vocab_service.create(
    system_identity,
    {
        "id": "eng.US",
        "title": {"en": "English (US)"},
        "hierarchy": {"parent": "eng"},
        "type": "languages"
    }
)

# Access hierarchy data
print(child.data["hierarchy"])
# {
#     "level": 2,
#     "titles": [{"en": "English (US)"}, {"en": "English"}],
#     "ancestors": ["eng"],
#     "ancestors_or_self": ["eng.US", "eng"],
#     "leaf": True,
#     "parent": "eng"
# }

Search with Hierarchy Filters

# Get all children of a term
results = vocab_service.search(
    system_identity,
    {"h-parent": "eng"},
    type="languages"
)

# Get all descendants
results = vocab_service.search(
    system_identity,
    {"h-ancestor": "eng"},
    type="languages"
)

# Filter by level
results = vocab_service.search(
    system_identity,
    {"h-level": 2},
    type="languages"
)

Update Parent Relationship

# Change parent
vocab_service.update(
    system_identity,
    ("languages", "eng.US"),
    {
        "hierarchy": {"parent": "eng.UK"},
        "title": {"en": "English (US)"},
        "type": "languages"
    }
)

# Remove parent (make root)
vocab_service.update(
    system_identity,
    ("languages", "eng.US"),
    {
        "hierarchy": {"parent": None},
        "title": {"en": "English (US)"},
        "type": "languages"
    }
)

Using Record API

from oarepo_vocabularies.records.api import Vocabulary

# Get record
record = Vocabulary.pid.with_type_ctx("languages").resolve("eng.US")

# Access hierarchy
print(record.hierarchy.level)           # 2
print(record.hierarchy.parent_id)       # "eng"
print(record.hierarchy.leaf)            # True
print(record.hierarchy.ancestors_ids)   # ["eng"]

# Query children
children = record.hierarchy.query_subterms()

# Update parent programmatically
record.parent.set("new_parent_id")
record.commit()

Testing

# Run all tests
./run.sh test

# Run specific test
pytest tests/test_hierarchy.py -v

# Run with coverage
pytest --cov=oarepo_vocabularies tests/

Development

# Install development dependencies
pip install -e ".[dev,tests]"

# Format code
black oarepo_vocabularies tests
isort oarepo_vocabularies tests
autoflake --in-place --remove-all-unused-imports -r oarepo_vocabularies

# Type checking
mypy oarepo_vocabularies

Entry Points

The package registers several Invenio entry points:

[project.entry-points."invenio_base.apps"]
oarepo_vocabularies = "oarepo_vocabularies.ext:OARepoVocabularies"
oarepo_vocabularies_ui = "oarepo_vocabularies.ui.ext:InvenioVocabulariesAppExtension"

[project.entry-points."invenio_base.api_apps"]
oarepo_vocabularies = "oarepo_vocabularies.ext:OARepoVocabularies"
oarepo_vocabularies_ui = "oarepo_vocabularies.ui.ext:InvenioVocabulariesAppExtension"

[project.entry-points."invenio_jsonschemas.schemas"]
oarepo_vocabularies = "oarepo_vocabularies.records.jsonschemas"

[project.entry-points."invenio_base.blueprints"]
oarepo_ui = "oarepo_vocabularies.views.app:create_app_blueprint"
oarepo_vocabularies_ui = "oarepo_vocabularies.ui.views:create_blueprint"
oarepo_vocabulary_type_ui = "oarepo_vocabularies.ui.views:create_vocabulary_type_blueprint"

[project.entry-points."invenio_base.api_blueprints"]
oarepo_vocabulary_type_api = "oarepo_vocabularies.views.api:create_api_blueprint"

[project.entry-points."invenio_assets.webpack"]
oarepo_vocabularies_ui_theme = "oarepo_vocabularies.ui.theme.webpack:theme"

[project.entry-points."invenio_i18n.translations"]
oarepo_vocabularies_ui = "oarepo_vocabularies"

License

Copyright (c) 2025 CESNET z.s.p.o.

OARepo Vocabularies is free software; you can redistribute it and/or modify it under the terms of the MIT License. See LICENSE file for more details.

Links

• Documentation: https://narodni-repozitar.github.io/developer-docs/docs/technology/invenio/nrp-toolchain/plugins/vocabularies
• Repository: https://github.com/oarepo/oarepo-vocabularies
• PyPI: https://pypi.org/project/oarepo-vocabularies/
• Issues: https://github.com/oarepo/oarepo-vocabularies/issues
• OARepo Project: https://github.com/oarepo

Acknowledgments

This project builds upon Invenio Framework and is developed as part of the OARepo ecosystem.