References/Report & Templates

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A Template defines reusable report markup and render options; a ReportUpload is one generated file (PDF/HTML/etc.) produced from that template and linked to a subject resource. You author templates through the API; report uploads are created for you by the file-upload flow.

Two layers back this:

• Storage layer — the Django models (care/emr/models/report/). Several fields are opaque (TextField/JSONField); their real shape lives in the spec layer, not the model.
• API layer — the Pydantic resource specs (care/emr/resources/report/), built on EMRResource. These define the enums, validation, the structure of the JSON fields, and the read/write schemas the API exposes.

Source:

• Models: [https://github.com/ohcnetwork/care/blob/develop/care/emr/models/report/report_upload.py report_upload.py], [https://github.com/ohcnetwork/care/blob/develop/care/emr/models/report/template.py template.py]
• Resource specs: [https://github.com/ohcnetwork/care/blob/develop/care/emr/resources/report/report_upload/spec.py report/report_upload/spec.py], [https://github.com/ohcnetwork/care/blob/develop/care/emr/resources/report/template/spec.py report/template/spec.py]

Models

Model	Purpose
ReportUpload	An uploaded, generated report file (PDF/HTML/etc.) produced from a Template and linked to a subject resource via associating_id
Template	A facility-scoped (or instance-wide) reusable report definition (markup + render options) used to generate reports

ReportUpload extends EMRBaseModel, the shared Care EMR base providing external_id, meta/history JSON, audit FKs, and soft-delete semantics.

Template extends SlugBaseModel, the facility-scoped slug variant (FACILITY_SCOPED = True, which adds slug handling on top of the EMR base). Slugs carry a prefix in storage: f-<facility_external_id>-<slug> when facility-scoped, i-<slug> when instance-wide (see [https://github.com/ohcnetwork/care/blob/develop/care/emr/models/base.py base.py]).

ReportUpload fields

Core

Field	Type	Notes
template	FK → Template (PROTECT)	Template the report was generated from. The template cannot be deleted while reports reference it
name	CharField(2000)	Display name of the report. Required in every spec {{Field|model=Report&Templates|section=Core|name=internal_name|type=CharField(2000)|notes=Randomized storage key, auto-generated on save so the file name never leaks PII (see [[#methods--save-behaviour}}
associating_id	CharField(100)	Non-null. Free-form identifier linking the report to its subject resource (e.g. an encounter)
upload_completed	BooleanField	Default False. Flips to True once the file upload to storage finishes
report_type	CharField(50)	File/content type of the report; also exposed via the file_type property for S3FilesManager

Archival

Field	Type	Notes
is_archived	BooleanField	Default False
archive_reason	TextField	Blank allowed
archived_datetime	DateTimeField	Nullable; set when the report is archived
archived_by	FK → User (PROTECT)	Nullable. related_name="archived_reports"

Inherited / metadata

Field	Type	Notes
meta	JSONField (default {})	Inherited from EMRBaseModel. Holds mime_type (surfaced by specs as mime_type) and other free-form metadata
history	JSONField (default {})	Inherited audit history
created_by / updated_by	FK → User (SET_NULL)	Inherited audit FKs; serialized as created_by/updated_by UserSpec

Storage

ReportUpload declares a class-level files_manager = S3FilesManager(BucketType.REPORT). The file body lives in object storage (REPORT bucket), not the database — the model row holds only metadata and the internal_name storage key.

Template fields

The Django model stores most config as plain strings plus an opaque options JSONField. The constraints live in the spec layer: it pins status, default_format, and the slug, and validates the structure and mutual compatibility of template_type, context, and options.

Field	Type (model)	Spec constraint	Notes
facility	FK → Facility (PROTECT, nullable)	UUID4
slug	CharField(255)	written via slug_value: SlugType; read as slug + parsed slug_config
name	CharField(255)	str, required
status	CharField(255)	TemplateStatusOptions enum
template_data	TextField	str, required (write)
template_type	CharField(255)	str, validated against ReportTypeRegistry
default_format	CharField(255)	TemplateFormatOptions enum
context	CharField(100) (default "encounter_base")	str, validated against DataPointRegistry
description	TextField (blank, default "")	str = ""
options	JSONField (default {})	dict = {}, validated against the format generator's options_model

TemplateStatusOptions values

status is bound to this enum (care/emr/resources/report/template/spec.py):

Value	Meaning
draft	Template being authored, not yet usable
active	Published, usable for generating reports
retired	Withdrawn from use

TemplateFormatOptions values

default_format is bound to this enum:

Value	Meaning
pdf	Render to PDF (uses the PDF generator's options_model)
html	Render to HTML (uses the HTML generator's options_model)

slug_config shape (read)

On read, TemplateReadSpec parses the stored prefixed slug back into a slug_config dict:

slug_config (facility-scoped) → { facility: <facility_external_id>, slug_value: <slug> }
slug_config (instance-wide)   → { slug_value: <slug> }   # parsed from "i-<slug>"

Resource specs (API schema)

All specs subclass EMRResource. Read runs serialize() → DB-field copy → perform_extra_serialization() hook. Write runs de_serialize() → DB-field copy → perform_extra_deserialization() hook.

ReportUpload specs (report/report_upload/spec.py)

Spec class	Role	Fields / behaviour
ReportUploadBaseSpec	shared	None, name: str
ReportUploadListSpec	read · list	Adds template (nested TemplateReadSpec), report_type, associating_id, archived_by (UserSpec), archived_datetime, upload_completed, is_archived, archive_reason, created_date, extension, uploaded_by, mime_type
ReportUploadRetrieveSpec	read · detail	Extends list spec; adds signed_url, read_signed_url, internal_name

Server-maintained read behaviour (perform_extra_serialization):

• id ← obj.external_id.
• extension ← obj.get_extension() (dotted extension parsed from internal_name).
• mime_type ← obj.meta["mime_type"].
• template ← serialized via TemplateReadSpec (full nested template object).
• created_by / updated_by populated from the user cache via serialize_audit_users.
• Signed URLs (retrieve only): a freshly created object (_just_created) gets a write/upload signed_url via files_manager.signed_url(obj); any other read gets a read_signed_url via files_manager.read_signed_url(obj). Exactly one is populated per response.

ReportUpload has no CreateSpec/UpdateSpec in this module. Uploads come from the file-upload flow (References/File Upload), and the report metadata and internal_name are platform-maintained. See save behaviour.

Template specs (report/template/spec.py)

Spec class	Role	Fields / behaviour
TemplateBaseSpec	shared	id, name, status (TemplateStatusOptions), default_format (TemplateFormatOptions), description = "", options = {}. __exclude__ = ["facility"]
TemplateCreateSpec	write · create	None, slug_value: SlugType, template_data: str, template_type: str, context: str
TemplateUpdateSpec	write · update	Identical to TemplateCreateSpec (pass subclass)
TemplateReadSpec	read · list	Base fields + slug_config: dict, slug: str, template_type: str, context: str (no template_data)
TemplateRetrieveSpec	read · detail	Extends read spec; adds nested facility (FacilityBareMinimumSpec) and template_data: str

Write-side validation and side effects (TemplateCreateSpec):

• slug_value — SlugType: 5–50 chars, pattern ^[a-zA-Z0-9][a-zA-Z0-9_-]*[a-zA-Z0-9]$.
• template_type (field_validator) — non-empty and resolvable via ReportTypeRegistry, else Invalid report type.
• context (field_validator) — non-empty and resolvable via DataPointRegistry, else Invalid Context type.
• validate_report_type_and_context (model_validator, after):
  • both template_type and context must resolve, else Invalid report type or context;
  • their associating_model must match (template_type.associating_model == context.__associating_model__), else Report Type and Context are not compatible;
  • options is validated against GeneratorRegistry.get(default_format).options_model, so the allowed options keys depend on whether default_format is pdf or html.
• perform_extra_deserialization (side effects): resolves facility external ID to the Facility row (get_object_or_404) when provided, and sets obj.slug = self.slug_value (the raw value; the model prefixes it in calculate_slug).

Read-side behaviour:

• TemplateReadSpec.perform_extra_serialization: id ← external_id; slug_config ← obj.parse_slug(obj.slug) (see slug_config shape).
• TemplateRetrieveSpec: additionally serializes facility via FacilityBareMinimumSpec when set.

Methods & save behaviour

ReportUpload.save()

On create (no id) or when internal_name is empty, save() generates a random internal_name from uuid4() plus the current epoch. This intermediate name decouples the stored object from the human-readable name, so a storage or data leak never exposes PII in file names.

• Pass skip_internal_name=True to save() to bypass generation and keep an explicitly set internal_name.
• If internal_name already held a value, its file extension is parsed (via parse_file_extension) and appended to the new randomized name.

ReportUpload.get_extension()

Returns the dotted extension(s) parsed from internal_name (e.g. .pdf), or "" if none. Surfaced as the extension field in read specs.

ReportUpload.file_type (property)

Alias for report_type, kept for compatibility with S3FilesManager.

Template slug methods (inherited from SlugBaseModel)

• calculate_slug() — returns the prefixed slug: f-<facility.external_id>-<slug> when facility-scoped, else i-<slug>.
• parse_slug(slug) — the inverse; returns slug_config (used by TemplateReadSpec).

API integration notes

• Report files live in object storage (S3-compatible REPORT bucket) and are read through S3FilesManager; the database row is metadata only.
• internal_name is platform-maintained — never set it from a client. Reserve skip_internal_name for controlled migrations. It is exposed only via ReportUploadRetrieveSpec.
• A freshly created report returns an upload signed_url; subsequent reads return a read_signed_url instead.
• Treat a report as available only once upload_completed is True.
• Populate associating_id when generating a report so the file can be retrieved in its subject resource's context.
• Template.options is validated server-side against the chosen format's generator schema, not an arbitrary bag; valid keys depend on default_format (pdf/html).
• template_type and context must form a compatible pair (same associating_model). The default context is encounter_base, so templates target encounters unless changed.
• Template.facility is nullable: null means instance-wide (i- slug), set means facility-scoped (f- slug).

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• Reference: References/Base models & conventions

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