Skip to main content

Clear | Remove | Delete Managed metadata (Taxanomy) column value in SharePoint List/ library

You may find many references to write into taxonomy columns (aka. managed metadata columns) but the clearing those is pretty much tricky.

Following code sample guide you through how you can clear the taxonomy column value in you custom client side application (JSOM) based on SharePoint.

[code type="javascript"]
//USAGE:
//clearWithValue =true => for clear saved taxanomy column values
//clearWithValue =false => wite into taxanomy column

function saveValuesToManagedMetadataColumns(listName, fieldId, taxanomyLabel, siteUrl, clearWithValue) {

//You many need seperate function to resolve GUID for the lable.
//Its based on your requirement and for now its hardcoded
var taxonmyGuid = "9f75f519-51f8-4723-9182-7e8225a54031";
//Loading context and list
var context = new SP.ClientContext(siteUrl);
var list = context.get_web().get_lists().getByTitle(listName);
//Getting item to update
var camlQuery = new SP.CamlQuery();
camlQuery.set_viewXml("<View>" +
"<Query>" +
"<Where><Eq>" +
"<FieldRef Name=\'ID\'/>" +
"<Value Type=\'Number\'>" + fieldId + "</Value>" +
"</Eq></Where>" +
"</Query>" +
"</View>");
var items = list.getItems(camlQuery);
//Load selected items to context
context.load(items);
//Loading MMS field
var field = list.get_fields().getByInternalNameOrTitle("taxanomyColumnName");
var txField = context.castTo(field, SP.Taxonomy.TaxonomyField);
//Load field to context
context.load(txField);

context.executeQueryAsync(function () {
//getting term set ID
var functionTermSetId = txField.get_termSetId().toString();
//Term value build for update..this is not useful is your purpose only for clearing
//But for illustration..got below also to show off
var termValue = new SP.Taxonomy.TaxonomyFieldValue();
termValue.set_label(taxanomyLabel);
termValue.set_termGuid(taxonmyGuid);
termValue.set_wssId(-1);
//Iterate through collection and update
var e = items.getEnumerator();
while (e.moveNext()) {
var item = e.get_current();

//Save to taxanomy column
if (clearWithValue == false)
txField.setFieldValueByValue(item, termValue);

//Clering taxanomy column
if (clearWithValue == true)
txField.validateSetValue(item, null);

//Set noraml fields..If you have them too
item.set_item('Title', metadataCollection.Title);

item.update();
}
context.executeQueryAsync(function (sender, args) {
console.log('Successfully updated item with ', args, serviceId, false);
}, function (args) {
console.log('Error on updating item with taxanomy value', args, serviceId, false);
});

}, function (args) {
console.log('Internal server Error on updating item with taxanomy metadata', args, serviceId, false);
});

}
[/code]
References
http://sharepoint.stackexchange.com/questions/47719/how-can-i-set-empty-value-to-taxonomyfield-of-microsoft-sharepoint-client-taxono

Comments

Popular posts from this blog

Turn off/ Hide Details panel/ Information Panel on modern SharePoint lists

Not always we require to show changes done by other which is a mandatory feature in SharePoint online.  What is details pane (aka. Information Pane)? Detail pane/ Information shows information regarding the document if you selected a one or its showing recent changes within a list or library. Follow link to Microsoft documentation about details pane. Bad news: Until Microsoft listen to User Voice , there is no straightforward way to enable disable this even you don't want. Good news: We could write a SharePoint framework extension to hack styles until Microsoft give us a permanent solution. How? I found this sample project (Inject CSS into modern SharePoint pages with React) which could reuse to our purpose. Thanks to Hugo for saving my time.  Steps to awesomeness:  Clone the project Resolve dependencies >  npm i Bundle >  gulp bundle --ship Package >  gulp package-solution --ship Upload package into SharePoint App catalog  

📢 Update -Top 10 Microsoft Teams questions from customers around the world

Over the last 4 months, we’ve traveled to 9 countries on Microsoft Ignite | The Tour meeting and speaking with users like you about Microsoft Teams. The insights and feedback at every location has been invaluable — Thank you. During our travels, there have been 10 questions that have repeatedly surfaced. Below are all of the questions — including the answers too, of course!   Can you restrict access to a specific channel in a team? What are best practices for governance, specifically around team creation, naming, and retention? Can I add guests to my team? If so, how? How does external access/federation work? How is this different to guest access? What functionalities do I get in a hybrid environment? Is Teams available for on-prem environments? How do I configure Direct Routing in Microsoft Teams? Why should I move from Skype for Business to Teams? How do I make this transition? I have existing SharePoint sites that I would like to bring into Teams. Can I do that? I need t

Eliminate Duplicates in Microsoft Flow and Azure Logic Apps

There is no straight forward method or Microsoft Flow action  to eliminate values in a collection like Microsft Excel (as of March 2019). This little hack will help you to eliminate/ remove duplicates and create a collection of unique values. Sample scenario: Need to send daily summarized notification to assigned approved with pending approval items. Sample workflow: Initialize an array Iterate collection of data and append items that are not there in the filtered array Side note: This won't be an option to consider if you too concerned about the performance of the workflow but for the time being its an option to consider.