How to develop custom module and rest api

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1

Application Name: Platform
Version Number: 2.4.3 Build 0ff0ed

Question: I’m new to Openmrs. I’m trying create my own module. I already looked these articles
Creating Your First Module - Documentation - OpenMRS Wiki
Creating Modules - Documentation - OpenMRS Wiki
Making Your First Module · GitBook

With these articles i already developed basic module. now i need to know how to connect this module to database and retrieve data? please help me? thanks in advance.

2

Dear @abayomi Here is the link that will guide you on the general overview about the rest module Adding a Web Service Step by Step Guide for Core Developers - Documentation - OpenMRS Wiki

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Thanks for the reply. I’m receiving error.

it’s showing java.sql.SQLSyntaxErrorException: Unknown column ‘this_.changed_by’ in ‘field list’ but i cannot find the place.

my code: - package org.openmrs.module.basicexample.web.controller;import org.springfram - Pastebin.com

please help me to fix this.

4

Your Item class its supposed to inherit all attributes from BaseOpenmrsData in the liquibase file. since your extending BaseOpenmrsData

5

Thanks for the reply. how can i save record. I tried post request to http://localhost:8080/openmrs/ws/rest/v1/item but it showing me

Request processing failed; nested exception is org.openmrs.module.webservices.rest.web.response.ResourceDoesNotSupportOperationException

6

It means your missing out the save method in the controller that does post payload from the endpoint to the database: Take a look at this for-example openmrs-module-webservices.rest/DrugResource1_8.java at fa0e04d6cde6e3a7f55a672217b2419257692ee6 · openmrs/openmrs-module-webservices.rest · GitHub

7

Do you mind sharing the link to the repository so that I could have a look at where your going wrong.

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Thanks for the reply. here is the code.

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Try autowiring the service in the ItemResource class

@Autowired
BasicexampleService basicexampleService;

then on save method try out this

Item item = basicexampleService.saveItem(t);

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I change it but still getting the same error

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Please share the github repository link here

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Thanks for the reply. here is the repository

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Can you help me to solve this plz?

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Dear @abayomi please check on the repo issues, there are comments which I have created.

Regards,

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17

Thank you very much. i will check that.

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Thank you very much for the help. i did the modification as you mentioned. but still not working. getting error

Request processing failed; nested exception is org.openmrs.module.webservices.rest.web.response.ResourceDoesNotSupportOperationException

i updated github code repo. can you check what’s wrong???

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Please check again, everything works now if you replace the with what i have changed but remember I did make changes on setOwner using User currentUser = Context.getAuthenticatedUser(); to set the owner value you will be required to update the tests so as to pass.

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after i replace these there is an error

There are test failures.[ERROR] [ERROR] Please refer to D:\rest\api\target\surefire-reports for the individual test results.

in that file there is an error

Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 0.555 sec <<< FAILURE! saveItem_shouldSetOwnerIfNotSet(org.openmrs.module.basicexample.api.BasicexampleServiceTest) Time elapsed: 0.48 sec <<< ERROR! org.openmrs.api.APIException: A user context must first be passed to setUserContext()...use Context.openSession() (and closeSession() to prevent memory leaks!) before using the API

so i keep the old code as it is. but i changed other modifications. now i’m receiving Request processing failed; nested exception is java.lang.NullPointerException

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I’m stuck here. can you help me

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Hello, @abayomi check on the github and merge the PR

1 Like