📅  最后修改于: 2023-12-03 15:20:42.137000             🧑  作者: Mango
In GraphQL, the type
keyword is used to define the schema of the data that can be queried from a GraphQL endpoint. One common issue that GraphQL developers face is when a type time
query returns null
. In this article, we'll explore the reasons why a type time
query may return null
in GraphQL and how to troubleshoot the issue.
Type Time
GraphQL to Return NullThere are several reasons why a GraphQL type time
query may return null
. Here are some of the most common issues:
Incorrect time format: The time value provided in the query may not follow the correct time format. If the time format does not match the expected format, it will likely return null
. It's important to ensure that the time value in the query matches the format specified in the schema.
Missing time values: If the time value is missing from the query, or if the time value is not specified, it may result in a null
response. It's important to check that the time value is present in the query and is correctly specified.
Timezone issues: Timezone-related issues can also cause a type time
query to return null
. In GraphQL, timestamps are stored in UTC time format by default. If the query does not specify the timezone, or if the timezone is incorrect, it may result in a null
response.
Type Time
GraphQL Returning NullIf you're experiencing issues with your type time
GraphQL query returning null
, here are some steps to troubleshoot the issue:
Check the query: Double-check the query to ensure that the time value is correctly specified and that the query matches the expected time format. If the query is incorrect, fix the query and try the query again.
Check the schema: Check the schema to ensure that the time format specified in the schema matches the query. If the schema is incorrect, update the schema to match the query.
Check the timezone: Check the timezone to ensure that it matches the query. If the timezone is incorrect, update the query with the correct timezone.
In summary, the type time
GraphQL query may return null
due to incorrect time formats, missing time values, or timezone issues. To troubleshoot the issue, double-check the query, schema, and timezone. By following these steps, you should be able to resolve the type time
GraphQL querying issue that's returning null
.