symfony - How to detect a change in the number of entities in an ArrayCollection -


does doctrine have event triggers when add or remove entry doctrine collection part of manytomany relationship?

i have entity has id , collection of tags in manytomany relationship. however, want able run event listener when tag added or removed entity. there way this?


Comments

Post a Comment

Popular posts from this blog

c++ - Do gcc's __float128 floating point numbers take the current rounding mode into account? -

do arithmetic operations on gcc's __float128 floating point numbers take current rounding mode account? for instance, if using c++11 function std::fesetenv , change rounding mode fe_downward , results of arithmetic operations on __float128 rounded down? is guaranteed __float128 specification? i believe guaranteed operations on __float128 take rounding mode account. according gnu c library documentation floating-point calculations respect rounding mode. according gcc manual __float128 floating type supports arithmetic operations division etc. from deduce, operations on __float128 , rounding mode has be taken account. the gnu c library documentation states: 20.6 rounding modes floating-point calculations carried out internally precision, , rounded fit destination type. ensures results precise input data. ieee 754 defines 4 possible rounding modes: [...] reference: http://www.gnu.org/software/libc/manual/html_node/rounding.html ...
Read more

java - the value of local variable is not used -

this question has answer here: java error “value of local variable not used” 7 answers i wrote small program check given movie name exist in folder. getting warning on eclipse "the value of local variable not used" here main method public static void main(string[] args) { // todo auto-generated method stub boolean movie_exist=false; system.out.println("hellow world!"); try{ filewriting newfolrder = new filewriting("h:\\breakinbad2\\breaking bad season 2 complete 720p.brrip.sujaidr"); //movie_exist=newfolrder.checkfilesname("movie name"); system.out.println(newfolrder.checkmovieexist("breaking bad")); movie_exist = newfolrder.checkmovieexist("breaking bad"); }catch(nullpointerexception e){ system.out.println("exce...
Read more