如何解决JSON-LD中的“Duplicate key found”错误？

Hey there, let's tackle that duplicate key error you're seeing in your opening hours JSON-LD. The root issue here is super straightforward: JSON doesn't allow duplicate keys in the same object, so when you repeat opens, closes, or daysOfWeek inside a single openingHoursSpecification block, the parser throws an error.

The Correct Schema.org Approach #

Schema.org expects each distinct time slot (even for the same day) to be its own openingHoursSpecification object, wrapped in an array. Here's how to refactor your code properly:

Example of the Wrong (Error-Causing) Code:

{
  "@context": "https://schema.org",
  "@type": "LocalBusiness",
  "name": "Your Office",
  "openingHoursSpecification": {
    "daysOfWeek": "Monday",
    "opens": "09:00",
    "closes": "12:30",
    "daysOfWeek": "Monday",
    "opens": "13:30",
    "closes": "18:00",
    "daysOfWeek": "Saturday",
    "opens": "10:00",
    "closes": "15:00"
  }
}

Refactored (Error-Free) Code:

{
  "@context": "https://schema.org",
  "@type": "LocalBusiness",
  "name": "Your Office",
  "openingHoursSpecification": [
    // Monday morning slot
    {
      "daysOfWeek": "Monday",
      "opens": "09:00",
      "closes": "12:30"
    },
    // Monday afternoon slot
    {
      "daysOfWeek": "Monday",
      "opens": "13:30",
      "closes": "18:00"
    },
    // Weekdays (Tue-Fri) with same hours
    {
      "daysOfWeek": ["Tuesday", "Wednesday", "Thursday", "Friday"],
      "opens": "09:00",
      "closes": "18:00"
    },
    // Saturday slot
    {
      "daysOfWeek": "Saturday",
      "opens": "10:00",
      "closes": "15:00"
    }
  ]
}

Key Takeaways to Avoid Duplicate Keys: #

• Use an array for openingHoursSpecification: Wrap all your time slot objects in square brackets []—this tells Schema.org you're defining multiple distinct opening periods.
• Unique objects per time slot: Even if it's the same day with split hours (like morning/afternoon breaks), each interval gets its own object with one set of daysOfWeek, opens, and closes.
• Group identical weekdays: If multiple days share the same hours, use an array for daysOfWeek (e.g., ["Tuesday", "Wednesday"]) to avoid repeating objects unnecessarily.
• Stick to 24-hour time: Use consistent formatting like 09:00 instead of 9 AM to ensure compatibility with Google's parser.

Once you refactor your code this way, run it through the structured data testing tool again—those duplicate key errors should be gone.

内容的提问来源于stack exchange，提问作者VBMali