Class Logger
コレクションでコンテンツを整理
必要に応じて、コンテンツの保存と分類を行います。
詳細なドキュメント
getLog()
現在のログ内のすべてのメッセージを返します。このメソッドを使用すると、スクリプト実行中に生成されたログ出力全体を保存またはメールで送信できます。
// Generate a log, then email it to the person who ran the script.
const files = DriveApp.getFiles();
while (files.hasNext()) {
Logger.log(files.next().getName());
}
const recipient = Session.getActiveUser().getEmail();
const subject = 'A list of files in your Google Drive';
const body = Logger.getLog();
MailApp.sendEmail(recipient, subject, body);
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String
- Logging コンソールからのログ
log(data)
データをログに書き込みます。データは、文字列、JavaScript オブジェクト、または message
プロパティを持つオブジェクトにできます。
Logger.log("my log message");
// Info my logmessage
Logger.log({ key: "value" });
// Info {key=value}
Logger.log({ message: "my log message", data: { key: "value" } })
// Info my logmessage
オブジェクトを渡すときに、オブジェクトに message
プロパティが含まれている場合、そのプロパティがログ メッセージとして使用されます。それ以外の場合、toString()
メソッドが呼び出され、オブジェクトが文字列に変換されます。JSON シリアル化可能な他のすべてのプロパティは、次の例に示すように、LogEntry
の jsonPayload
の一部として含まれます。
{
"insertId": "w5eib...",
"jsonPayload": {
"message": "my log message",
"serviceContext": {
"service": "AKfyc..."
},
"data": {
"key": "value"
}
},
"resource": {
"type": "app_script_function",
"labels": {
"invocation_type": "editor",
"function_name": "unknown",
"project_id": "1234567890"
}
},
"timestamp": "2024-11-15T23:28:19.448591Z",
"severity": "INFO",
"labels": {
"script.googleapis.com/user_key": "AOX2d...",
"script.googleapis.com/process_id": "EAEA1...",
"script.googleapis.com/project_key": "MQXvl...",
"script.googleapis.com/deployment_id": "AKfyc..."
},
"logName": "projects/[PROJECT_ID]/logs/script.googleapis.com%2Fconsole_logs",
"receiveTimestamp": "2024-11-15T23:28:20.363790313Z"
}
パラメータ
名前 | 型 | 説明 |
data | Object | ログに記録するオブジェクト |
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Logger
- チェーン用の Logger。
指定された形式と値を使用して、書式設定された文字列をロギング コンソールに書き込みます。文字列には複数の %s
プレースホルダを含めることができます。これらのプレースホルダは、引数のリストから対応する値に置き換えられ、文字列に変換されます。
// Log the number of Google Groups you belong to.
const groups = GroupsApp.getGroups();
Logger.log('You are a member of %s Google Groups.', groups.length);
パラメータ
名前 | 型 | 説明 |
format | String | values 引数の数と同じ数の %s インスタンスを含む書式文字列 |
values | Object... | 形式文字列に挿入する値(変数の数) |
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Logger
- チェーン用の Logger
特に記載のない限り、このページのコンテンツはクリエイティブ・コモンズの表示 4.0 ライセンスにより使用許諾されます。コードサンプルは Apache 2.0 ライセンスにより使用許諾されます。詳しくは、Google Developers サイトのポリシーをご覧ください。Java は Oracle および関連会社の登録商標です。
最終更新日 2025-07-26 UTC。
[null,null,["最終更新日 2025-07-26 UTC。"],[[["\u003cp\u003eThe \u003ccode\u003eLogger\u003c/code\u003e class enables developers to write text to debugging logs for script analysis and troubleshooting.\u003c/p\u003e\n"],["\u003cp\u003eIt provides methods to clear the log, retrieve the entire log as a string, and write formatted or unformatted messages to the log.\u003c/p\u003e\n"],["\u003cp\u003eLogged output can be viewed within the Apps Script editor using "View > Show logs" and utilized for debugging purposes.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003egetLog()\u003c/code\u003e method allows for capturing the log content, which can then be used for saving, emailing, or further processing.\u003c/p\u003e\n"],["\u003cp\u003eDevelopers can leverage format strings and values to create structured log messages using the \u003ccode\u003elog(format, values)\u003c/code\u003e method.\u003c/p\u003e\n"]]],[],null,["# Class Logger\n\nLogger\n\nThis class allows the developer to write to the Execution log and to [Google Cloud Logging](https://cloud.google.com/logging) if the script is associated with\na [standard\nCloud Project](https://developers.google.com/apps-script/guides/cloud-platform-projects#standard). This class is preferred for structured logging and `json``Payload` support\nin Cloud Logging. For time-based logging, use [console](/apps-script/reference/base/console). \n\n### Methods\n\n| Method | Return type | Brief description |\n|-----------------------------------------------|-------------|-----------------------------------------------------------------------------------------|\n| [clear()](#clear()) | `void` | Clears the log. |\n| [getLog()](#getLog()) | `String` | Returns a complete list of messages in the current log. |\n| [log(data)](#log(Object)) | [Logger](#) | Writes the data to the log. |\n| [log(format, values)](#log(String,Object...)) | [Logger](#) | Writes a formatted string to the logging console, using the format and values provided. |\n\nDetailed documentation\n----------------------\n\n### `clear()`\n\nClears the log.\n\n*** ** * ** ***\n\n### `get``Log()`\n\nReturns a complete list of messages in the current log. This method can be used to save or\nemail the entire log output generated during script execution.\n\n```javascript\n// Generate a log, then email it to the person who ran the script.\nconst files = DriveApp.getFiles();\nwhile (files.hasNext()) {\n Logger.log(files.next().getName());\n}\nconst recipient = Session.getActiveUser().getEmail();\nconst subject = 'A list of files in your Google Drive';\nconst body = Logger.getLog();\nMailApp.sendEmail(recipient, subject, body);\n```\n\n#### Return\n\n\n`String` --- the log from the logging console\n\n*** ** * ** ***\n\n### `log(data)`\n\nWrites the data to the log. The data can be a string, a JavaScript object, or an object with a\n`message` property.\n\n```javascript\nLogger.log(\"my log message\");\n// Info my logmessage\nLogger.log({ key: \"value\" });\n// Info {key=value}\nLogger.log({ message: \"my log message\", data: { key: \"value\" } })\n// Info my logmessage\n```\n\nWhen passing an object, if the object contains a `message` property, that property is\nused as the log message. Otherwise, the `to``String()` method is called to convert the\nobject to a string. All other properties which are JSON serializable are included as part of\nthe `json``Payload` in the [`Log``Entry`](https://cloud.google.com/logging/docs/reference/v2/rest/v2/LogEntry), similar to the example below:\n\n```transact-sql\n{\n \"insertId\": \"w5eib...\",\n \"jsonPayload\": {\n \"message\": \"my log message\",\n \"serviceContext\": {\n \"service\": \"AKfyc...\"\n },\n \"data\": {\n \"key\": \"value\"\n }\n },\n \"resource\": {\n \"type\": \"app_script_function\",\n \"labels\": {\n \"invocation_type\": \"editor\",\n \"function_name\": \"unknown\",\n \"project_id\": \"1234567890\"\n }\n },\n \"timestamp\": \"2024-11-15T23:28:19.448591Z\",\n \"severity\": \"INFO\",\n \"labels\": {\n \"script.googleapis.com/user_key\": \"AOX2d...\",\n \"script.googleapis.com/process_id\": \"EAEA1...\",\n \"script.googleapis.com/project_key\": \"MQXvl...\",\n \"script.googleapis.com/deployment_id\": \"AKfyc...\"\n },\n \"logName\": \"projects/[PROJECT_ID]/logs/script.googleapis.com%2Fconsole_logs\",\n \"receiveTimestamp\": \"2024-11-15T23:28:20.363790313Z\"\n}\n```\n\n#### Parameters\n\n| Name | Type | Description |\n|--------|----------|-------------------|\n| `data` | `Object` | the object to log |\n\n#### Return\n\n\n[Logger](#) --- the Logger, for chaining.\n\n*** ** * ** ***\n\n### `log(format, values)`\n\nWrites a formatted string to the logging console, using the format and values provided. The\nstring can include multiple `%s` placeholders, which are replaced with corresponding\nvalues from the list of arguments, converted to strings.\n\n```javascript\n// Log the number of Google Groups you belong to.\nconst groups = GroupsApp.getGroups();\nLogger.log('You are a member of %s Google Groups.', groups.length);\n```\n\n#### Parameters\n\n| Name | Type | Description |\n|----------|-------------|---------------------------------------------------------------------------------------------|\n| `format` | `String` | a format string that contains as many instances of `%s` as the number of `values` arguments |\n| `values` | `Object...` | a variable number of values to insert into the format string |\n\n#### Return\n\n\n[Logger](#) --- the Logger, for chaining"]]