sql server - how to make a field auto increment in a table in grails? and when deleted it adjust the other records -


i have table called trip users can create trips, , on edit screen have button users can click on , create legs selected trip. question how make field in triplegs domain auto increment? lets user creates 4 trip legs, stop number field "the 1 wanted auto populate" 1 2 3 4 if user goes , delete trip leg 2 how change stop number in rest 3 legs 1 2 3 instead of 1 3 4 enter image description here

i have agree vahid's comment on original question. preferred approach dynamically set value transient value on domain after sorted collection criteria.

if wanted maintain same sort order every time based on leg created sequentially, add 'created_date' column table , sort based on value when list.

alternatively, if store stop_number value (which there plenty of reasons why might want to) might want consider following approach:

override default delete action triplegs:

class triplegcontroller {   def delete = {     def triplegid = params.triplegid long     def tripleg = tripleg.get(triplegid)     def otherlegs = tripleg.findallbytripandidnotequal(tripleg.trip, triplegid, [sort: 'stopnumber', order: 'asc'])     tripleg.delete(failonerror: true)     def stopnum = 1     otherlegs.each{leg ->        leg.stopnumber = stopnum       leg.save()       stopnum++     }   } }

Comments

Post a Comment

Popular posts from this blog

python Tkinter Capturing keyboard events save as one single string -

is possible store keyboard events 1 string? code below stores 1 char , prints it. card reader or bar code reader, contains collection of character/ string not 1 character @ time. goal save char pressed text variable. from tkinter import * root = tk() def key(event): text= event.char text+= event.char print ("pressed", text) def callback(event): frame.focus_set() print ("clicked at", event.x, event.y) frame = frame(root, width=100, height=100) frame.bind("<key>", key) frame.bind("<button-1>", callback) frame.pack() root.mainloop() currently, creating text variable , everytime key() function gets called, , text stores last character typed. you can define text module level variable , , use module level text inside key function - text = '' def key(event): global text text+= event.char print("pressed", text)
Read more

android - InAppBilling registering BroadcastReceiver in AndroidManifest -

i'm implementing inapp billing in android app. works well, however, i'm trying decouple broadcast receiver activity manifest. suggestion in android's trivialdrive sample: // important: dynamically register broadcast messages updated purchases. // register receiver here instead of <receiver> in manifest // because call getpurchases() @ startup, therefore can ignore // broadcasts sent while app isn't running. // note: registering listener in activity bad idea, done here // because sample. regardless, receiver must registered after // iabhelper setup, before first call getpurchases(). currently there's class extends broadcastreceiver : public class iabbroadcastreceiver extends broadcastreceiver { /** * intent action receiver should filter for. */ public static final string action = "com.android.vending.billing.purchases_updated"; private final iabbroadcastlistener mlistener; public iabbroadcastreceiver(iabbroadcastlistener listener) { m
Read more

javascript - Z-index in d3.js -

i have map , when hover effect on region of map below yellow line , circle, last ones disappear. how can solve problem? http://jsfiddle.net/ot21n9qx/ var arc = g.append("path") .style("fill", "none") .style("stroke", "yellow") .style("stroke-width", 2) .attr("d", "m" + pathorigin[0] + "," + pathorigin[1] + " q" + svgpoint[0] + "," + pathorigin[1] + " " + svgpoint[0] + "," + svgpoint[1]); var circlesize = d3.scale.linear() .domain([0, 0.5, 1]) .range([4, 10, 4]); svg not have z order draws objects in order created. need create path , circle after create highlight regions. here forked fiddle: http://jsfiddle.net/o00fzgaf/1/
Read more