How can I get information (column names) from previous node into next node's dialog?

Node Development
1

I have two nodes. 

1) First node: It just takes table name.

2) Second node: It shows table information for.eg: column name.

In second node, I have a DialogComponentColumnNameSelection dialog. In this dialog I want to view all the column names from previous one.

I tried overwriting *loadSettingsFrom*. But I don't know how to do this for my case. How will I get column names in that dialog. 

Any help will be appreciated!

2

loadSettingsFrom gets the table spec from the previous node as second parameter. You will find all the columns in there.

3

Hi,

Can I execute sql query inside *loadsettingsfrom* or configure in load model?

 

4

Theorectically you could but you shouldn't. All load/save/validateSettings methods as well as configure in NodeModel are supposed to execute (very) fast. In the NodeDialog it's a different story, there you can execute some longer-running operations. However, as long as the method doesn't return the dialog won't be shown. It's better to do it asynchrously and update the GUI after you have the result.