How can i populate a dropdown field with the database table's column values

RE: How can i populate a dropdown field with the database table's column values

Shivam Gupta — Tue, 15 Aug 2017 11:29:28 GMT

Instead of query rule, GO with Query Entity and fetch the column content you want to fetch as it will enhance the performance of your application.
Suppose you have a table{categoriesOfFood, foodId}, write a expression rule to query Db using query entity.
and than use the expression rule in the choiceValues parameter of the a!dropDown component

RE: How can i populate a dropdown field with the database table's column values

Alok Patro — Tue, 15 Aug 2017 10:26:55 GMT

if you are specific about a column ,, Use a query entity rather than a query rule.
You should only use query rules when you need values of all the columns of the table.

RE: How can i populate a dropdown field with the database table's column values

nareshc647 — Mon, 14 Aug 2017 15:43:09 GMT

I agree with Jacob Grafenstein.

RE: How can i populate a dropdown field with the database table's column values

Jacob Grafenstein — Mon, 14 Aug 2017 15:06:57 GMT

To expand on Sathya's comment, you can create a query rule that pulls a list of CDTs from the database. Within your dropdown field, set the choiceLabels to be the text values for each CDT using:

index([list of CDTs], [column name], {})

Set the choiceValues in a similar way. Assuming you'd like to store a lookup value in your database, the field in your CDT would be the primary key from the database.

index([list of CDTS], [primary key field], {})

Hope this helps anyone who sees this thread in the future.

RE: How can i populate a dropdown field with the database table's column values

Sathya Srinivasan — Mon, 20 Jan 2014 18:06:25 GMT

Use a query rule to fetch the data and use the dot (.) notation to query the corresponding column from the returned CDT.