ExtJS conditionally queried data does not appear on the grid

When a conditional query is made on a extjs, it is found that the results of the query on the grid are not displayed as long as the query criteria are entered, but if you do not enter all the criteria for the default query

Data can be displayed. When you enter a condition, the data in the background is correctly returned to the JSON format. It's not a problem.

Half a day, just don't know where the wrong. A sudden epiphany is suspected to be the issue of the store, and a look is sure that his store did not join Remotefilter:true

's Properties. And my filter is using the Store.addfilter () method.

ExtJS conditionally queried data does not appear on the grid