How do I import a CSV file into Realm using Realm Converter?

Use the ImportSchemaGenerator to analyze CSV files and generate a compatible schema, then pass that schema and file paths to CSVDataImporter to create the Realm file. The README example shows this two-step process for seamless data ingestion.

Can Realm Converter export data to Excel format?

No, it only exports to CSV format. If you need XLSX output, you'll have to convert the CSV using external tools, as the exporter doesn't support direct Excel file generation.

Realm Converter vs writing custom import code – which is better?

Realm Converter automates schema generation and standard format handling, saving time for common use cases. For highly customized data transformations or performance-critical pipelines, manual code might offer more control and efficiency.

How to handle large JSON files with Realm Converter?

The README doesn't specify performance limits, so test with your data size. For large files, ensure adequate memory and consider splitting data into batches, as the tool may not be optimized for streaming or massive datasets.

Is Realm Converter compatible with Realm Sync?

It focuses on local file import/export and doesn't integrate directly with Realm's sync features. You'd typically import data locally first, then use Realm's sync capabilities separately if needed.

What are the limitations of Realm Converter's schema generation?

Schema generation relies on file analysis and may struggle with complex nested JSON or inconsistent CSV headers. Errors aren't detailed in the README, so validation and manual adjustments might be necessary for non-standard data.

Open-Awesome

realm-cocoa-converter

Apache-2.0Swift

A Swift library for importing data from CSV, XLSX, and JSON into Realm files and exporting Realm data to CSV.

GitHub

220 stars23 forks0 contributors

What is realm-cocoa-converter?

Realm Converter is a Swift library that facilitates data interchange between Realm databases and common file formats like CSV, XLSX, and JSON. It solves the problem of migrating external data into Realm by automatically generating compatible schemas and handling the import/export process programmatically.

Target Audience

iOS and macOS developers using Realm databases who need to import data from external sources (e.g., spreadsheets, JSON APIs) or export Realm data for analysis or backup.

Value Proposition

Developers choose Realm Converter because it automates schema generation from external files, reducing manual effort and errors when setting up Realm data models. It provides a native Swift/Objective-C API that integrates seamlessly with existing Realm projects.

Overview

A library that provides the ability to import/export Realm files from a variety of data container formats.

Use Cases

Best For

Migrating legacy data from CSV or Excel spreadsheets into a Realm database
Exporting Realm data to CSV for external reporting or analysis tools
Automating data import pipelines from JSON APIs into Realm
Creating Realm schemas dynamically based on external data structures
Backing up Realm data in a portable, human-readable format
Integrating Realm with data from third-party systems that output CSV, XLSX, or JSON

Not Ideal For

Applications requiring real-time data import/export with low latency
Projects using database systems other than Realm (e.g., Core Data or SQLite)
Scenarios needing to export data back to XLSX or JSON formats
Teams looking for a graphical user interface for data conversion tasks

Pros & Cons

Pros

Automated Schema Inference

Analyzes CSV, XLSX, or JSON files to generate compatible Realm schemas, eliminating the need for manual data model definition and reducing errors in data ingestion.

Multi-Format Import Support

Imports from CSV, XLSX, and JSON, covering common data sources for seamless migration of external data into Realm databases, as highlighted in the README features.

Native Apple Ecosystem Integration

Built in Swift with Objective-C bridging and prefixed classes (e.g., RLM), ensuring smooth integration for iOS and macOS developers already using Realm.

Simplified Export for Backup

Exports Realm data to CSV format using CSVDataExporter, providing a straightforward method for creating portable backups or data extracts for external analysis.

Cons

Limited Export Capabilities

Only exports to CSV, lacking support for exporting back to XLSX or JSON, which can hinder data interchange with systems expecting those formats.

File Path Dependency

Requires absolute file paths for operations, as shown in examples, making it less flexible in sandboxed environments and prone to errors with relative paths.

Realm-Exclusive Utility

Solely designed for Realm databases, offering no value for projects using alternative persistence solutions like Core Data, limiting its broader applicability.

Basic Documentation

The README provides minimal examples without error handling or advanced usage guidance, leaving developers to figure out edge cases and performance considerations on their own.

Frequently Asked Questions

Related Projects

MMKV

An efficient, small mobile key-value storage framework developed by WeChat. Works on Android, iOS, macOS, Windows, POSIX, and OHOS.

Stars18,610

Forks1,982

Last commit5 days ago

Realm

Realm is a mobile database: a replacement for Core Data & SQLite

Stars16,608

Forks2,223

Last commit2 months ago

WCDB

WCDB is a cross-platform database framework developed by WeChat.

Stars11,493

Forks1,498

Last commit1 month ago

SQLite.swift

A type-safe, Swift-language layer over SQLite3.

Stars10,161

Forks1,617

Last commit4 days ago

Community-curated · Updated weekly · 100% open source

Found a gem we're missing?

Open-Awesome is built by the community, for the community. Submit a project, suggest an awesome list, or help improve the catalog on GitHub.

Submit a project Star on GitHub