Step by Step Guide to Building a Kintone API Integration in Go

Introduction

Hey there, fellow developer! Ready to dive into the world of Kintone API integration using Go? You're in for a treat. Kintone's API is a powerhouse for customizing and extending your Kintone apps, and Go's simplicity and performance make it a perfect match. Let's get cracking!

Prerequisites

Before we jump in, make sure you've got:

• Go installed on your machine
• A Kintone account with API access
• Your thinking cap on (and maybe a cup of coffee)

I'm assuming you're already familiar with Go basics and Kintone concepts. If not, no worries – just brush up on those real quick, and you'll be good to go.

Setting Up the Project

First things first, let's set up our Go project:

mkdir kintone-go-integration
cd kintone-go-integration
go mod init kintone-go-integration

Now, let's grab the kintone package:

go get github.com/kintone/go-kintone

Configuring the Kintone Client

Time to get our hands dirty with some code:

package main

import (
    "fmt"
    "github.com/kintone/go-kintone"
)

func main() {
    client := &kintone.Client{
        Domain:   "your-subdomain.kintone.com",
        User:     "your-username",
        Password: "your-password",
        // Or use API token instead:
        // APIToken: "your-api-token",
    }

    // We'll use this client for all our operations
}

Performing CRUD Operations

Retrieving Records

Let's fetch some records:

app := &kintone.App{
    Client: client,
    AppID:  123, // Replace with your app ID
}

records, err := app.GetRecords(nil)
if err != nil {
    fmt.Printf("Error retrieving records: %v\n", err)
    return
}

for _, record := range records {
    fmt.Printf("Record ID: %s\n", record.ID())
}

Creating New Records

Adding a new record is a breeze:

newRecord := kintone.NewRecord()
newRecord.Set("Title", "My Awesome Title")
newRecord.Set("Description", "This is a great description")

id, err := app.AddRecord(newRecord)
if err != nil {
    fmt.Printf("Error adding record: %v\n", err)
    return
}
fmt.Printf("Added new record with ID: %d\n", id)

Updating Existing Records

Updating is just as easy:

updateRecord := kintone.NewRecord()
updateRecord.Set("Title", "Updated Title")

err = app.UpdateRecordByID(123, updateRecord) // Replace 123 with the actual record ID
if err != nil {
    fmt.Printf("Error updating record: %v\n", err)
    return
}
fmt.Println("Record updated successfully")

Deleting Records

Out with the old:

err = app.DeleteRecords([]uint64{123, 456}) // Replace with actual record IDs
if err != nil {
    fmt.Printf("Error deleting records: %v\n", err)
    return
}
fmt.Println("Records deleted successfully")

Handling Custom Fields and Data Types

Kintone has various field types. Here's how to handle a few:

// Date field
newRecord.Set("Date", kintone.NewDate(2023, 5, 17))

// Dropdown field
newRecord.Set("Category", kintone.SingleSelectField("Option 1"))

// Attachment
file, _ := os.Open("path/to/file.pdf")
fileKey, _ := app.Upload("file.pdf", file)
newRecord.Set("Attachment", kintone.FileField{&kintone.File{FileKey: fileKey}})

Error Handling and Best Practices

Always check for errors and respect rate limits:

if err != nil {
    // Log the error, maybe retry the operation
    return
}

// Consider adding a small delay between requests
time.Sleep(200 * time.Millisecond)

Advanced Topics

Want to level up? Try bulk operations:

records := []*kintone.Record{
    kintone.NewRecord().Set("Title", "Bulk 1"),
    kintone.NewRecord().Set("Title", "Bulk 2"),
}

ids, err := app.AddRecords(records)
if err != nil {
    fmt.Printf("Error in bulk add: %v\n", err)
    return
}
fmt.Printf("Added %d records\n", len(ids))

Testing the Integration

Don't forget to test! Here's a simple example:

func TestAddRecord(t *testing.T) {
    // Set up a test client and app
    // ...

    newRecord := kintone.NewRecord().Set("Title", "Test Record")
    id, err := app.AddRecord(newRecord)

    assert.NoError(t, err)
    assert.NotZero(t, id)
}

Conclusion

And there you have it! You're now equipped to build robust Kintone integrations with Go. Remember, this is just the tip of the iceberg. Explore the go-kintone package documentation for more advanced features and don't be afraid to experiment.

Happy coding, and may your integrations be ever smooth and your errors few!