Sheetlog

Sheetlog is a simple wrapper to add to and read from Google Sheets.

It can be used to easily save data like logs or form responses to Google Sheets, turning Sheets into simple databases.

Since Sheets supports up to roughly 200,000 cells per sheet, this makes Sheetlog perfect for toy projects and MVPs that need a "faux", persisted "database". Think of it as a lighter alternative to Notion Database or Airtable, as opposed to something like Firebase or Supabase.

The Google Sheets API is prone to rate limiting and slow cold starts, so is not ideal for high-traffic or fast applications.

Sheetlog is built on top of the excellent SpreadAPI library, which is a Google Apps Script library that turns any Google Sheets into a data store.

Installation

1. Install package: yarn add --dev @yawnxyz/sheetlog
2. Create a Google Sheet
3. Follow the installation instructions for SpreadAPI
4. Replace the default script with the custom script (sheetlog.js) in this repo
5. Make sure to change the appropriate authentication for your app — the default is fully open.
6. Deploy the app per installation instructions, and get the custom URL.
7. Set that URL to .env.SHEET_URL to your deployed SpreadAPI Apps Script, or with sheet.setup({sheetUrl: "some url"})
8. Create a new Google Sheets tab named "Logs"
9. Now you can log any object to your sheet, with sheet.log({some: "data"}) to your code, and it'll log to the Logs sheet!

Usage

Quick Start

To start logging data to your Google Sheet:

import sheet from '@yawnxyz/sheetlog';

// initialize the sheet
const testSheet = new Sheetlog({
  sheetUrl: "https://script.google.com/macros/s/AKfycby41wlkjusaKDYebYCGMiACdomPVjcsXr56wdONy8nDtvu--Zewdn28PZ6Lx7I1fni3/exec",
  sheet: "testSheet"
});

let result = await testSheet.log({
  Name: "test"
})

This adds the data to the Name column of the testSheet.

Basic Methods

.log(payload, options)

The .log function is the core method used to interact with the sheet. It accepts:

• payload: The data to be logged (object or array)
• options: Configuration object including:
  • sheet: Sheet name (defaults to "Logs")
  • sheetUrl: Optional custom sheet URL
  • method: Request method (defaults to "POST")
  • id: Row ID for operations like GET/PUT
  • idColumn: Column name for UPSERT operations
  • Additional parameters specific to each method

Example:

const payload = { name: 'John', age: 30 };
await sheet.log(payload, { 
  sheet: 'Users'
});

.get(id, options)

Retrieves data from the sheet. Can fetch single rows or multiple with pagination.

Example of single row:

// Get row with ID 123
const row = await sheet.get(123);

Example of multiple rows:

// Get multiple rows with options
const rows = await sheet.get(null, {
  method: "GET",
  limit: 10,
  start_id: 100,
  order: "desc"
});

.post(payload, options)

Creates new rows in the sheet. Automatically adds timestamp in "Date Modified" column.

const result = await sheet.post({ 
  name: 'Jane',
  email: '[email protected]'
}, {
  sheet: 'Users'
});

.upsert(idColumn, id, payload, options)

Updates existing row or creates new one if not found. Uses specified column as unique identifier.

const result = await sheet.upsert(
  'email',                    // idColumn
  '[email protected]',        // id
  { status: 'active' },      // payload
  { sheet: 'Users' }         // options
);

.find(idColumn, id, returnAllMatches, options)

Searches for rows matching the specified criteria. Returns single object or array based on returnAllMatches.

// Find single match
const user = await sheet.find(
  'email',                    // idColumn
  '[email protected]',        // id
  false                      // returnAllMatches
);

// Find all matches
const users = await sheet.find(
  'status',                  // idColumn
  'active',                  // id
  true                      // returnAllMatches
);

.dynamicPost(payload, options)

Adds new rows and automatically creates new columns for any new fields in the payload.

const result = await sheet.dynamicPost({
  name: 'Alice',
  newField: 'value',      // Creates column if doesn't exist
  nested: { foo: 'bar' }  // Will be JSON stringified
}, {
  sheet: 'Users'
});

.paginatedGet(options)

Provides cursor-based pagination for large datasets.

const results = await sheet.paginatedGet({
  cursor: "100",           // Starting point
  limit: 20,              // Items per page
  sortBy: "Date Modified", // Sort column
  sortDir: "desc",        // Sort direction
  sheet: "Users"
});

.rangeUpdate(data, options)

Efficiently updates multiple cells in a range.

const result = await sheet.rangeUpdate([
  ["A1", "B1", "C1"],
  ["A2", "B2", "C2"]
], {
  sheet: "Users",
  startRow: 2,
  startCol: 3
});

.aggregate(column, operation, options)

Performs calculations on numeric columns.

const result = await sheet.aggregate(
  "amount",           // column
  "sum",             // operation: sum, avg, min, max, count
  {
    sheet: "Sales",
    where: { status: "completed" }
  }
);

Column Management

// Add new column
sheet.log(null, {
  method: "ADD_COLUMN",
  columnName: "newColumn"
});

// Rename column
sheet.log(null, {
  method: "EDIT_COLUMN",
  oldColumnName: "oldName",
  newColumnName: "newName"
});

// Remove column
sheet.log(null, {
  method: "REMOVE_COLUMN",
  columnName: "columnToRemove"
});

Features

• Simple logging interface with sheet.log()
• Automatic timestamp tracking with "Date Modified" column
• Dynamic column creation
• JSON object serialization for nested data
• Multiple authentication methods
• Pagination support
• Bulk operations
• Aggregation functions
• Data export options
• Custom sheet management

Authentication

Sheetlog supports flexible authentication patterns:

const logger = new Sheetlog({
  users: [
    // Admin with full access
    {
      name: "admin",
      key: "myStr0ng!Pass",  // Strong password required
      permissions: "*"       // ALL access
    },

    // Power user with mixed permissions
    {
      name: "poweruser",
      key: "P0wer!User",
      permissions: {
        logs: ["GET", "POST"],     // Multiple methods for one sheet
        analytics: "GET",          // Single method for one sheet
        config: ["PUT", "DELETE"]  // Multiple methods for another sheet
      }
    },

    // Read-only user
    {
      name: "viewer",
      key: "V1ewer!Pass",
      permissions: {
        public: "GET",
        reports: "GET"
      }
    }
  ]
});

Authentication Requirements

Keys must be:

• 8+ characters long
• Include lowercase, uppercase, number, and special character
• Can be marked as UNSAFE() to bypass security requirements (development only)

Available Methods

To run these folllowing methods, set the method key in the payload for the desired method when using sheet.log().

For example, to run GET_ROWS:

sheet.log(null, {
  method: "GET_ROWS",
    sheet: "testSheet",
    startRow: 1,
    endRow: 9099
});

| Method | Description | |--------|-------------| | GET | Fetch single or multiple rows | | POST | Create new rows | | PUT | Update existing rows | | DELETE | Remove rows | | UPSERT | Create or update based on ID | | DYNAMIC_POST | Create rows with dynamic columns | | ADD_COLUMN | Add new columns | | EDIT_COLUMN | Rename columns | | REMOVE_COLUMN | Delete columns | | FIND | Search for specific values | | BULK_DELETE | Remove multiple rows | | PAGINATED_GET | Get rows with pagination | | EXPORT | Export data in different formats | | AGGREGATE | Perform calculations on columns | | BATCH_UPDATE | Update multiple rows efficiently |

Retrieve Specific Rows

You can retrieve specific rows from a Google Sheet using the GET_ROWS method. This method allows you to specify a range of rows to fetch.

Parameters:

• sheet: The name of the sheet.
• startRow: The starting row number (1-indexed).
• endRow: (Optional) The ending row number. If not provided, only the startRow will be retrieved.

Example:

{
  method: "GET_ROWS",
  sheet: "logs",
  startRow: 2,
  endRow: 5
}

Retrieve Specific Columns

You can retrieve specific columns from a Google Sheet using the GET_COLUMNS method. This method allows you to specify a range of columns to fetch by their letter or number.

Parameters:

• sheet: The name of the sheet.
• startColumn: The starting column identifier (e.g., "A", "G", or 1).
• endColumn: (Optional) The ending column identifier. If not provided, only the startColumn will be retrieved.

Example:

{
  method: "GET_COLUMNS",
  sheet: "logs",
  startColumn: "A",
  endColumn: "C"
}

Method Index & Examples

// Fetch all
{
  "method": "GET",
  "sheet": "testSheet"
}

// Fetch the first row of data (row 1 is the header row since Sheets is 1-indexed)
{
  "method": "GET",
  "sheet": "testSheet",
  "id": 2
}

// Fetch multiple rows with pagination
{
  "method": "GET",
  "sheet": "links",
  "start_id": 2,
  "limit": 5
}

// Create a new row
{
  "method": "POST",
  "sheet": "users",
  "payload": {
    "name": "John Doe",
    "email": "[email protected]"
  }
}

// Create or update a row based on ID
{
  "method": "UPSERT",
  "sheet": "users",
  "idColumn": "userId",
  "id": 123,
  "payload": {
    "name": "Jane Doe",
    "email": "[email protected]"
  }
}

// Create rows with dynamic columns
{
  "method": "DYNAMIC_POST",
  "sheet": "data",
  "payload": {
    "newField": "newValue",
    "anotherField": "anotherValue"
  }
}

// Update specific fields in a row
{
  "method": "PUT",
  "sheet": "users",
  "id": 123,
  "payload": {
    "email": "[email protected]"
  }
}

// Delete a specific row
{
  "method": "DELETE",
  "sheet": "users",
  "id": 123
}

// Add a new column to the sheet
{
  "method": "ADD_COLUMN",
  "sheet": "users",
  "columnName": "newColumn"
}

// Rename an existing column
{
  "method": "EDIT_COLUMN",
  "sheet": "users",
  "oldColumnName": "oldName",
  "newColumnName": "newName"
}

// Remove a column from the sheet
{
  "method": "REMOVE_COLUMN",
  "sheet": "users",
  "columnName": "columnToRemove"
}

// Find rows by a specific column value
{
  "method": "FIND",
  "sheet": "users",
  "idColumn": "email",
  "id": "[email protected]",
  "returnAllMatches": true
}

// Bulk delete multiple rows
{
  "method": "BULK_DELETE",
  "sheet": "users",
  "ids": [1, 2, 3, 4]
}

// Get rows with pagination
{
  "method": "PAGINATED_GET",
  "sheet": "logs",
  "limit": 20,
  "cursor": "100",
  "sortBy": "timestamp",
  "sortDir": "desc"
}

// Export data in a specific format
{
  "method": "EXPORT",
  "sheet": "logs",
  "format": "csv"
}

// Perform aggregation on a column
{
  "method": "AGGREGATE",
  "sheet": "sales",
  "column": "amount",
  "operation": "sum"
}

// Batch update multiple rows
{
  "method": "BATCH_UPDATE",
  "sheet": "logs",
  "payload": [
    { "_id": 1, "status": "complete" },
    { "_id": 2, "status": "pending" }
  ]
}

// Fetch specific rows
{
  "method": "GET_ROWS",
  "sheet": "testSheet",
  "startRow": 2,
  "endRow": 10
}

// Fetch specific columns
{
  "method": "GET_COLUMNS",
  "sheet": "testSheet",
  "startColumn": "B",
  "endColumn": "D"
}

// Fetch a single column
{
  "method": "GET_COLUMNS",
  "sheet": "testSheet",
  "startColumn": "G"
}

// Fetch all cells and data in the sheet
{
  "method": "GET_ALL_CELLS",
  "sheet": "testSheet"
}

// Update a range of cells
{
  "method": "RANGE_UPDATE",
  "sheet": "dynamicSheet", 
  "startRow": 2,
  "startCol": 3,
  "data": [
    ["A1", "B1", "C1"],
    ["A2", "B2", "C2"],
    ["A3", "B3", "C3"]
  ]
}