fix write path

ui/src/data_explorer/apis/index.js

@@ -2,7 +2,7 @@ import AJAX from 'src/utils/ajax'
 
 export const writeData = (source, db, data) => {
   return AJAX({
-    url: `${source.links.write$}?db=${db}`,
+    url: `${source.links.write}?db=${db}`,
     method: 'POST',
     data,
   })

ui/src/data_explorer/components/WriteDataForm.js

@@ -35,7 +35,7 @@ class WriteDataForm extends Component {
   handleWrite() {
     const {onClose, source, notify} = this.props
     const {selectedDatabase} = this.state
-    writeData(source, selectedDatabase.text, this.editor.value).then(() => {
+    writeData(source, selectedDatabase, this.editor.value).then(() => {
       notify('success', 'Data was written successfully')
       onClose()
     })