DataTables is a fantastic software that turns any HTML table into an interactive and editable one.
Chicago Cityscape uses DataTables on pretty much every page. DataTables also provides server-side processing for PHP to grab the right data from a database and show it to the user, 10 records at a time (the number of records can be changed by the user to show more records at a time).
One of the problems I’ve had to get around is that the DataTables Editor script recognizes a
SELECT statement with only one function per field. If there’s a second function that’s manipulating a field in the
SELECT statement then the
I almost always use the two functions
This is a known issue – see this thread on the DataTables forums – that Allan, the DataTables creator, has acknowledged and provided an alternative solution for.
It turns out that it’s easy to write a function that combines both functions.
CREATE OR REPLACE FUNCTION ST_TAGJP (field geometry, srid int =4326, simplify int =5) RETURNS text RETURN ST_AsGeoJSON(ST_Transform(field, srid), simplify);
The code above is a function I call
ST_TAGJP that combines the two functions I already described, and is flexible by letting the user specify in the arguments the table and field, the SRID to transform (reproject) to, and the simplify variable that can be used in
ST_AsGeoJSON that tells it how many decimal points to use in coordinates.