Add Rows

import com.atlassian.crowd.embedded.api.User;
import com.atlassian.jira.component.ComponentAccessor;
import com.atlassian.jira.issue.CustomFieldManager;
import com.atlassian.jira.issue.Issue;
import com.atlassian.jira.issue.IssueManager;
import com.atlassian.jira.issue.fields.CustomField;
import com.atlassian.jira.security.JiraAuthenticationContext;
import com.atlassian.plugin.PluginAccessor;
import com.atlassian.jira.user.ApplicationUser;
  
// get an issue
IssueManager issueManager = ComponentAccessor.getOSGiComponentInstanceOfType(IssueManager.class);
Issue issue = issueManager.getIssueObject("TEST-1");
  
// get TGE custom field
CustomFieldManager customFieldManager = ComponentAccessor.getOSGiComponentInstanceOfType(CustomFieldManager.class);
//Script Runner can show validation error for this line. Just ignore them.
CustomField tgeCustomField = customFieldManager.getCustomFieldObjectsByName("TGE_TEST").get(0);
Long tgeCustomFieldId = tgeCustomField.getIdAsLong();
  
// get current user
JiraAuthenticationContext jiraAuthenticationContext = ComponentAccessor.getOSGiComponentInstanceOfType(JiraAuthenticationContext.class);
Object userObject = jiraAuthenticationContext.getLoggedInUser();
User user = userObject instanceof ApplicationUser ? ((ApplicationUser) userObject).getDirectoryUser() : (User) userObject;
  
// read grid data
PluginAccessor pluginAccessor = ComponentAccessor.getPluginAccessor();
Class dataManagerClass = pluginAccessor.getClassLoader().findClass("com.idalko.jira.plugins.igrid.api.data.TGEGridTableDataManager");
def tgeGridDataManager = ComponentAccessor.getOSGiComponentInstanceOfType(dataManagerClass);
  
StringBuilder result = new StringBuilder();
def callResult = null;
//Script Runner can show validation error for the next two lines. Just ignore them.
try {
    callResult = tgeGridDataManager.readGridData(issue.getId(), tgeCustomFieldId, null, null, 0, 10, user);
    result.append("Grid ID=" + tgeCustomFieldId + " content before modification: " + callResult.getValues() + "\n");
} catch (Exception e) {
    result.append("Grid ID=" + tgeCustomFieldId + " data cannot be retrieved: " + e.getMessage() + "\n");
}
  
// let's add some rows
Map<String, Object> row = new HashMap<String, Object>();
row.put("isummary", "Some summary");
row.put("iassignee", "admin");
row.put("istatus", "Done");
row.put("idue", new Date().getTime());
  
//Script Runner can show validation errors here as well. Ignore them.
try {
    List<Long> rowIds = tgeGridDataManager.addRows(issue.getId(), tgeCustomFieldId, Arrays.asList(row), user);
    result.append("Grid ID=" + tgeCustomFieldId + " data was successfully added. IDs of added rows: " + rowIds + "\n");
} catch (Exception e) {
    result.append("Grid ID=" + tgeCustomFieldId + " data cannot be added: " + e.getMessage() + "\n");
}
  
// check if data was really added
//Ignore the Script Runner validation errors
try {
    callResult = tgeGridDataManager.readGridData(issue.getId(), tgeCustomFieldId, null, null, 0, 10, user);
    result.append("Grid ID=" + tgeCustomFieldId + " content after modification: " + callResult.getValues() + "\n");
} catch (Exception e) {
    result.append("Grid ID=" + tgeCustomFieldId + " data cannot be retrieved: " + e.getMessage() + "\n");
}
  
println(result.toString());
return result.toString();