Coding⏱️ 3 min read📅 2026-06-03

How to Fix: 'Field required a bean of type that could not be found.' error Spring RESTful API using MongoDB

Error in Spring RESTful API using MongoDB

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📋 Table of Contents

  1. 🔍 Why This Happens
  2. 🔧 Proven Troubleshooting Steps
  3. 💡 Conclusion

The 'Field required a bean of type that could not be found' error occurs when the Spring Framework is unable to locate a specific Bean in its context. This issue affects developers who are using Spring RESTful APIs and MongoDB as their database.

This error can be frustrating because it prevents the application from functioning correctly, and it requires additional time and effort to resolve. In this troubleshooting guide, we will walk through the steps to identify the root cause of the error and provide two alternative methods for fixing the issue.

🔍 Why This Happens

  • The primary reason for this error is that the Spring Framework is not able to locate a Bean in its context due to a mismatch between the Bean definition and the actual implementation. This can occur when there are typos or incorrect class names in the configuration files.
  • Alternatively, the error could be caused by a circular dependency between Beans, where two or more Beans depend on each other, causing an infinite loop of dependencies.

🔧 Proven Troubleshooting Steps

Enable Spring Boot Auto-Configuration

  1. Step 1: Open the pom.xml file and add the following dependency: org.springframework.bootspring-boot-starter-data-mongodb
  2. Step 2: Update the application.properties file to include the MongoDB connection settings: mongo.uri=mongodb://localhost:27017/, mongodb.database=mydatabase
  3. Step 3: Restart the Spring Boot application to enable auto-configuration and resolve the 'Field required a bean of type that could not be found' error.

Manually Configure the Spring Framework

  1. Step 1: Open the Spring Boot Application.properties file and add the following configuration: spring.data.mongodb.uri=mongodb://localhost:27017/, spring.data.mongodb.database=mydatabase
  2. Step 2: Update the application context configuration to include the MongoDB Bean definition: @Bean public MongoTemplate mongoTemplate() { return new MongoTemplate(new MongoClient('mongodb://localhost:27017/'), 'mydatabase'); }
  3. Step 3: Restart the Spring Boot application and verify that the 'Field required a bean of type that could not be found' error is resolved.

💡 Conclusion

By following these steps, you should be able to resolve the 'Field required a bean of type that could not be found' error in your Spring RESTful API using MongoDB. Remember to enable auto-configuration or manually configure the Spring Framework to ensure that the Beans are properly defined and located.

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