Private Investigator Case Log Backend

Private Investigator Case Log Backend Template
Case Files, Evidence Items, and Billing

Q: How should private investigator case log teams split responsibilities without leaking data across roles?

It is a BaaS schema and API for investigation work: case files, evidence logs, surveillance notes, and client billing entries.

Q: Which private investigator case log workflows benefit most from structured tasks versus free-form notes?

It includes User, CaseFile, EvidenceItem, SurveillanceNote, and BillingEntry, plus an ER diagram, API sandbox, and an AI Agent prompt.

Q: What is the best way to add private investigator case log reporting fields without slowing down daily work?

Back4app provides managed database, auth, real-time queries, and flexible schema so you can ship evidence logging and surveillance notes without running your own backend.

Q: How do I run queries for case files and notes with Flutter?

Use the CaseFile and SurveillanceNote classes to query open investigations and recent watch notes through the Back4app SDK.

Q: How do I manage private investigator case log access with Next.js server actions?

Use a server action to create a Parse Object for EvidenceItem with a CaseFile pointer and validation for evidenceTag, storageUrl, and collectedAt fields. Optionally enforce the rule in Cloud Code.

Q: Can React Native cache case logs offline?

Yes. Enable Local Datastore and pin CaseFile, EvidenceItem, and SurveillanceNote results so investigators can review records without connectivity.

Q: How do I prevent unauthorized evidence edits?

In Cloud Code beforeSave for EvidenceItem, enforce assigned-investigator checks and reject writes that do not belong to the CaseFile.

Q: What is the best way to show billable time on Android?

Query BillingEntry and CaseFile classes to display hours, rate, amount, and workType for each investigation.

A production-ready private investigator case log backend on Back4app with CaseFile, EvidenceItem, SurveillanceNote, and BillingEntry classes. Track case history, preserve evidence tags, and keep billing tied to the same file.

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Key Case Log Takeaways

This template gives you a private investigator case log backend with CaseFile, EvidenceItem, SurveillanceNote, and BillingEntry records so staff can keep a clean chronological file.

Case-by-case evidence tracking — Model EvidenceItem with evidenceTag, evidenceType, storageUrl, and isSealed fields for each item.
Surveillance note chronology — Keep SurveillanceNote entries tied to a CaseFile with noteTime, location, summary, and detail.
Client billing records — Use BillingEntry to capture hours, rate, amount, workType, and approvedBy per CaseFile.
Role-aware access — Restrict CaseFile, EvidenceItem, and BillingEntry access with ACL and CLP rules.
Web and mobile API parity — Serve React, Flutter, Next.js, and native apps through the same REST and GraphQL endpoints.

What Is the Private Investigator Case Log Template?

If private investigator case log intake is messy, everything downstream suffers — clean capture at the front door saves hours of reconstruction later. Clarity beats heroics. This template models CaseFile, EvidenceItem, SurveillanceNote, and BillingEntry with role-based access on Back4app so every private investigator case log teammate sees the slice of the pipeline they own.

Best for:

Private investigator case managementEvidence logging systemsSurveillance note capture toolsClient billing trackersMVP launchesTeams selecting BaaS for PI workflows

What you get in the Private Investigator Case Log template

In private investigator case log, the hardest conversations start with “which number is official?” — a sign the backend is not authoritative yet.

Every technology card here maps to the same CaseFile, EvidenceItem, and SurveillanceNote model — pick a stack without re-negotiating your backend contract.

PI Case Log Core Features

Every technology card in this hub uses the same case log backend schema with User, CaseFile, EvidenceItem, SurveillanceNote, and BillingEntry.

Case file management

CaseFile stores caseNumber, clientName, status, assignedInvestigator, and billingRate.

Evidence logging

EvidenceItem links to CaseFile and captures evidenceTag, evidenceType, storageUrl, and isSealed.

Surveillance notes

SurveillanceNote stores noteTime, location, summary, detail, and followUpNeeded for each watch period.

Client billing entries

BillingEntry captures entryDate, hours, rate, amount, workType, and approvedBy.

Why Build Your PI Case Log with Back4app?

Back4app gives you the data classes and access controls to keep case files, evidence, notes, and billing entries organized while the team stays focused on field work.

•CaseFile and EvidenceItem stay linked: Store each EvidenceItem against a CaseFile so photos, receipts, and chain-of-custody details remain attached to the right investigation.
•SurveillanceNote timelines are easier to read: A noteTime field on SurveillanceNote makes the watch log sortable by observation time instead of free-text guesswork.
•BillingEntry matches the investigation record: Capture hours, rate, amount, and workType in BillingEntry to connect field time with client billing.

Build the case log once, then reuse the same backend contract across web, mobile, and investigator dashboards.

PI Case Log Benefits

A case log backend that keeps investigation notes and billing organized from the first entry.

Cleaner evidence trails

EvidenceItem records preserve evidenceTag, evidenceType, storageUrl, and collectedAt for each item.

Readable surveillance history

SurveillanceNote entries tied to a CaseFile give you a time-ordered field record with location, summary, and detail.

Billing that follows the case

BillingEntry keeps hours, rate, amount, and workType connected to the same CaseFile the work came from.

Access control for sensitive files

Use ACL and CLP so only assigned investigators can edit a CaseFile or add EvidenceItem rows.

Cross-device access to case logs

REST and GraphQL APIs let web dashboards, mobile field apps, and back-office billing tools read the same CaseFile data.

Fast schema reuse

Start with User, CaseFile, EvidenceItem, SurveillanceNote, and BillingEntry instead of building case records field by field.

Ready to launch your private investigator case log?

Let the Back4app AI Agent scaffold your case log backend and generate CaseFile, EvidenceItem, SurveillanceNote, and BillingEntry flows from one prompt.

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Case Log Tech Stack

Everything included in this private investigator case log backend template.

Frontend

13+ technologies

Backend

Back4app

Database

MongoDB

Auth

Built-in auth + sessions

API

REST and GraphQL

Realtime

Live Queries

Case ER Diagram

Entity relationship model for the private investigator case log backend schema.

ER Diagram

View diagram source

Mermaid

erDiagram
    User ||--o{ CaseFile : "assignedInvestigator"
    User ||--o{ EvidenceItem : "collectedBy"
    User ||--o{ SurveillanceNote : "observer"
    User ||--o{ BillingEntry : "approvedBy"
    CaseFile ||--o{ EvidenceItem : "caseFile"
    CaseFile ||--o{ SurveillanceNote : "caseFile"
    CaseFile ||--o{ BillingEntry : "caseFile"

    User {
        String objectId PK
        String username
        String email
        String password
        String role
        Date createdAt
        Date updatedAt
    }

    CaseFile {
        String objectId PK
        String caseNumber
        String clientName
        String status
        String assignedInvestigatorId FK
        Number billingRate
        Date openedAt
        Date closedAt
        Date createdAt
        Date updatedAt
    }

    EvidenceItem {
        String objectId PK
        String caseFileId FK
        String evidenceTag
        String evidenceType
        String storageUrl
        String collectedById FK
        Date collectedAt
        String locationLabel
        Boolean isSealed
        Date createdAt
        Date updatedAt
    }

    SurveillanceNote {
        String objectId PK
        String caseFileId FK
        Date noteTime
        String observerId FK
        String location
        String summary
        String detail
        Boolean followUpNeeded
        Date createdAt
        Date updatedAt
    }

    BillingEntry {
        String objectId PK
        String caseFileId FK
        Date entryDate
        Number hours
        Number rate
        Number amount
        String workType
        String approvedById FK
        Date createdAt
        Date updatedAt
    }

Case Sync Flow

Typical runtime flow for sign in, CaseFile loading, EvidenceItem uploads, SurveillanceNote creation, and BillingEntry review.

ER Diagram

View diagram source

Mermaid

sequenceDiagram
  participant User
  participant App as Private Investigator Case Log App
  participant Back4app as Back4app Cloud

  User->>App: Sign in to the case log
  App->>Back4app: POST /login
  Back4app-->>App: Session token

  User->>App: Open today's CaseFile list
  App->>Back4app: GET /classes/CaseFile?order=-openedAt
  Back4app-->>App: CaseFile rows

  User->>App: Add an EvidenceItem or SurveillanceNote
  App->>Back4app: POST /classes/EvidenceItem or /classes/SurveillanceNote
  Back4app-->>App: Saved objectId and timestamps

  User->>App: Review BillingEntry totals for a CaseFile
  App->>Back4app: GET /classes/BillingEntry?include=caseFile
  Back4app-->>App: BillingEntry list

  App->>Back4app: Live update case activity
  Back4app-->>App: CaseFile, EvidenceItem, SurveillanceNote changes

Field Dictionary

Full field-level reference for every class in the private investigator case log schema.

Field	Type	Description	Required
objectId	String	Auto-generated unique identifier	Auto
username	String	User login name
email	String	User email address
password	String	Hashed password (write-only)
role	String	Staff role such as investigator, admin, or billing
createdAt	Date	Auto-generated creation timestamp	Auto
updatedAt	Date	Auto-generated last-update timestamp	Auto

7 fields in User

Case Security and Permissions

How ACL and CLP strategy secures users, case files, evidence items, notes, and billing entries.

Assigned investigator controls

Only the assigned User or case owner can update a CaseFile, add evidence, or revise billing details.

Evidence integrity checks

Use Cloud Code validation so EvidenceItem rows require a CaseFile pointer, storageUrl, and collectedBy trail.

Scoped read access

Restrict case notes and billing entries to the staff working that file; sensitive entries should not be exposed broadly.

JSON Schema

Raw JSON schema definition ready to copy into Back4app or use as implementation reference.

JSON

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{
  "classes": [
    {
      "className": "User",
      "fields": {
        "objectId": {
          "type": "String",
          "required": false
        },
        "username": {
          "type": "String",
          "required": true
        },
        "email": {
          "type": "String",
          "required": true
        },
        "password": {
          "type": "String",
          "required": true
        },
        "role": {
          "type": "String",
          "required": true
        },
        "createdAt": {
          "type": "Date",
          "required": false
        },
        "updatedAt": {
          "type": "Date",
          "required": false
        }
      }
    },
    {
      "className": "CaseFile",
      "fields": {
        "objectId": {
          "type": "String",
          "required": false
        },
        "caseNumber": {
          "type": "String",
          "required": true
        },
        "clientName": {
          "type": "String",
          "required": true
        },
        "status": {
          "type": "String",
          "required": true
        },
        "assignedInvestigator": {
          "type": "Pointer",
          "required": true,
          "targetClass": "User"
        },
        "billingRate": {
          "type": "Number",
          "required": true
        },
        "openedAt": {
          "type": "Date",
          "required": true
        },
        "closedAt": {
          "type": "Date",
          "required": false
        },
        "createdAt": {
          "type": "Date",
          "required": false
        },
        "updatedAt": {
          "type": "Date",
          "required": false
        }
      }
    },
    {
      "className": "EvidenceItem",
      "fields": {
        "objectId": {
          "type": "String",
          "required": false
        },
        "caseFile": {
          "type": "Pointer",
          "required": true,
          "targetClass": "CaseFile"
        },
        "evidenceTag": {
          "type": "String",
          "required": true
        },
        "evidenceType": {
          "type": "String",
          "required": true
        },
        "storageUrl": {
          "type": "String",
          "required": true
        },
        "collectedBy": {
          "type": "Pointer",
          "required": true,
          "targetClass": "User"
        },
        "collectedAt": {
          "type": "Date",
          "required": true
        },
        "locationLabel": {
          "type": "String",
          "required": false
        },
        "isSealed": {
          "type": "Boolean",
          "required": true
        },
        "createdAt": {
          "type": "Date",
          "required": false
        },
        "updatedAt": {
          "type": "Date",
          "required": false
        }
      }
    },
    {
      "className": "SurveillanceNote",
      "fields": {
        "objectId": {
          "type": "String",
          "required": false
        },
        "caseFile": {
          "type": "Pointer",
          "required": true,
          "targetClass": "CaseFile"
        },
        "noteTime": {
          "type": "Date",
          "required": true
        },
        "observer": {
          "type": "Pointer",
          "required": true,
          "targetClass": "User"
        },
        "location": {
          "type": "String",
          "required": true
        },
        "summary": {
          "type": "String",
          "required": true
        },
        "detail": {
          "type": "String",
          "required": true
        },
        "followUpNeeded": {
          "type": "Boolean",
          "required": true
        },
        "createdAt": {
          "type": "Date",
          "required": false
        },
        "updatedAt": {
          "type": "Date",
          "required": false
        }
      }
    },
    {
      "className": "BillingEntry",
      "fields": {
        "objectId": {
          "type": "String",
          "required": false
        },
        "caseFile": {
          "type": "Pointer",
          "required": true,
          "targetClass": "CaseFile"
        },
        "entryDate": {
          "type": "Date",
          "required": true
        },
        "hours": {
          "type": "Number",
          "required": true
        },
        "rate": {
          "type": "Number",
          "required": true
        },
        "amount": {
          "type": "Number",
          "required": true
        },
        "workType": {
          "type": "String",
          "required": true
        },
        "approvedBy": {
          "type": "Pointer",
          "required": false,
          "targetClass": "User"
        },
        "createdAt": {
          "type": "Date",
          "required": false
        },
        "updatedAt": {
          "type": "Date",
          "required": false
        }
      }
    }
  ]
}

Build with AI Agent

Use the Back4app AI Agent to generate a real private investigator case log app from this template, including frontend, backend, auth, and CaseFile, EvidenceItem, SurveillanceNote, and BillingEntry flows.

Back4app AI Agent

Ready to build

Create a private investigator case log app backend on Back4app with this exact schema and behavior.

Schema:
1. User (use Back4app built-in): username, email, password, role; objectId, createdAt, updatedAt (system).
2. CaseFile: caseNumber (String, required), clientName (String, required), status (String, required), assignedInvestigator (Pointer to User, required), billingRate (Number, required), openedAt (Date, required), closedAt (Date, optional); objectId, createdAt, updatedAt (system).
3. EvidenceItem: caseFile (Pointer to CaseFile, required), evidenceTag (String, required), evidenceType (String, required), storageUrl (String, required), collectedBy (Pointer to User, required), collectedAt (Date, required), locationLabel (String, optional), isSealed (Boolean, required); objectId, createdAt, updatedAt (system).
4. SurveillanceNote: caseFile (Pointer to CaseFile, required), noteTime (Date, required), observer (Pointer to User, required), location (String, required), summary (String, required), detail (String, required), followUpNeeded (Boolean, required); objectId, createdAt, updatedAt (system).
5. BillingEntry: caseFile (Pointer to CaseFile, required), entryDate (Date, required), hours (Number, required), rate (Number, required), amount (Number, required), workType (String, required), approvedBy (Pointer to User, optional); objectId, createdAt, updatedAt (system).

Security:
- Limit CaseFile visibility to assigned investigators and billing staff.
- EvidenceItem records should be writable only by staff with case access.
- SurveillanceNote entries must preserve chronological history.
- BillingEntry totals are editable by billing-approved staff.

Auth:
- Sign-up, login, logout.

Behavior:
- List open case files, create evidence entries, add surveillance notes, calculate billing entries, and show live updates for case activity.

Deliver:
- Back4app app with schema, ACLs, CLPs; frontend for case management, evidence logging, surveillance notes, and client billing.

Press the button below to open the Agent with this template prompt pre-filled.

This is the base prompt without a technology suffix. You can adapt the generated frontend stack afterward.

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API Sandbox

Try REST and GraphQL endpoints against the private investigator case log schema. Responses use mock data and do not require a Back4app account.

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Uses the same schema as this template.

Choose Your Technology

Expand each card to see how to integrate CaseFile, EvidenceItem, and SurveillanceNote with your chosen stack.

What You Get with Every Technology

Every stack uses the same private investigator case log backend schema and API contracts.

Unified case log structure

Manage User, CaseFile, EvidenceItem, SurveillanceNote, and BillingEntry records with a consistent schema.

Evidence logging for PI work

Record evidenceTag, evidenceType, storageUrl, and collectedAt for every EvidenceItem.

Surveillance note timelines

Capture location, summary, detail, and noteTime for fieldwork review.

Client billing records

Track hours, rate, amount, and workType per CaseFile.

REST/GraphQL APIs for investigations

Integrate web, mobile, and office tools with one backend contract.

Extensible case workflow

Add new classes or fields as your investigation process changes.

Private Investigator Tech Comparison

Compare setup speed, SDK style, and AI support across all supported technologies.

Framework	Setup Time	PI Case Log Benefit	SDK Type	AI Support
Flutter	About 5 min	Single codebase for investigator case logs on mobile and web.	Typed SDK	Full
React	Under 5 minutes	Fast web dashboard for case files and evidence.	Typed SDK	Full
React Native	~3–7 min	Cross-platform mobile app for field notes and evidence capture.	Typed SDK	Full
Next.js	Rapid (5 min) setup	Server-rendered case management portal for investigators.	Typed SDK	Full
JavaScript	~3–5 min	Lightweight web integration for PI logs.	Typed SDK	Full
Android	About 5 min	Native Android app for field surveillance notes.	Typed SDK	Full
iOS	Under 5 minutes	Native iOS app for evidence logging.	Typed SDK	Full
Vue	~3–7 min	Reactive web UI for case log review.	Typed SDK	Full
Angular	Rapid (5 min) setup	Enterprise web app for case files and billing.	Typed SDK	Full
GraphQL	Under 2 min	Flexible GraphQL API for nested case data.	GraphQL API	Full
REST API	Quick (2 min) setup	REST API integration for PI case logs.	REST API	Full
PHP	~3 min	Server-side PHP backend for case file workflows.	REST API	Full
.NET	~3–7 min	.NET backend for investigations and billing.	Typed SDK	Full

Setup time reflects expected duration from project bootstrap to first case file or evidence query using this template schema.

PI Case Log FAQ

Common questions about building a private investigator case log backend with this template.

How should private investigator case log teams split responsibilities without leaking data across roles?

Which private investigator case log workflows benefit most from structured tasks versus free-form notes?

What is the best way to add private investigator case log reporting fields without slowing down daily work?

How do I run queries for case files and notes with Flutter?

How do I manage private investigator case log access with Next.js server actions?

Can React Native cache case logs offline?

How do I prevent unauthorized evidence edits?

What is the best way to show billable time on Android?

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Private Investigator Case Log Backend TemplateCase Files, Evidence Items, and Billing