Ruby on Rails: Why doesn't my formatting work when downloading XLS? -

-

following railscast http://railscasts.com/episodes/362-exporting-csv-and-excel?autoplay=true trying format xls download, below code doesn't format xls file opens excel (with no data , no file opened).

mime_types.rb:

mime::type.register "application/xls", :xls

contacts_controller:

def index   @contacts = contact.where(user_id: session[:user_id])   respond_to |format|     format.html     format.csv { send_data @contacts.to_csv }     format.xls   end end

contact model:

def self.to_csv(options = {})   csv.generate(options) |csv|     csv << column_names     all.each |contact|         csv << contact.attributes.values_at(*column_names)     end   end end

index.xls.erb:

<table border="1">   <tr>     <th>firstname</th>     <th>surname</th>     <th>email</th>   </tr>   <% @contacts.each |contact| %>   <tr>     <td><%= contact.firstname %></td>     <td><%= contact.surname %></td>     <td><%= contact.email %></td>   </tr>   <% end %> </table>

can tell me of reason this?

can note when replacing line format.xls in controller format.xls { send_data @contacts.to_csv(col_sep: "\t") } does download xls file no formatting.

but opens excel (with no data , no file opened).

perhaps, has fact send html table, not spreadsheet data. in railscast, ryan generates xml markup instead. did try that?

when replacing line format.xls in controller format.xls { send_data @contacts.to_csv(col_sep: "\t") } download xls file no formatting.

actually, happens download csv file pretends xls file, excel trying friendly , lets pass. no formatting, because csv data-only format. not possible embed formatting data there, excel doesn't fetch any.

you'll better results generating real thing instead of generating "fake" spreadsheets , hope excel interprets them correctly. check out axlsx gem, example.


Comments

Post a Comment

Popular posts from this blog

Spring Boot + JPA + Hibernate: Unable to locate persister -

-
i trying work entity inside request method of spring boot application. entity in project , pom.xml has dependencies it. why error message?: org.hibernate.unknownentitytypeexception: unable locate persister: com.ric.bill.model.bs.par package com.ric.web; import java.util.concurrent.atomic.atomiclong; import javax.persistence.entitymanager; import javax.persistence.persistencecontext; import net.sf.ehcache.cachemanager; import net.sf.ehcache.management.cache; import net.sf.ehcache.management.cachestatistics; import org.hibernate.stat.statistics; import org.springframework.beans.factory.annotation.autowired; import org.springframework.boot.autoconfigure.domain.entityscan; import org.springframework.cache.annotation.enablecaching; import org.springframework.transaction.annotation.enabletransactionmanagement; import org.springframework.transaction.annotation.propagation; import org.springframework.transaction.annotation.transactional; import org.springframework.web.bind.annotati
Read more

go - Golang: panic: runtime error: invalid memory address or nil pointer dereference using bufio.Scanner -

-
i implementing go program uses bufio.scanner , bufio.writer have packaged code follows package main import ( "fmt" "player/command" "strings" ) func main() { //enter code here. read input stdin. print output stdout commands.scanner.scan() { //scan new line , send comand variable check command exist or not input := strings.split(strings.trim(commands.scanner.text(), " "), " ") command := input[0] if command == "" { fmt.printf("$ %s:", commands.pwd) continue } if !commands.commands[command] { commands.throwerror("cannot recognize input.") } else { commands.execute(command, input[1:], nil) } fmt.printf("$ %s:", commands.pwd) } } i using init.go file in main package follows package main import ( "flag" "player/sourc
Read more

c - double free or corruption (fasttop) -

-
this code reads null terminated string file (file containing null terminated strings & should provide index wanted string). error: *** error in `./main': double free or corruption (fasttop): 0x090a4a80 *** aborted code: char *tmp_realloc=null; char *sstring=null; int i=1; /*set file pointer point string*/ fseek(fh,index,seek_set); sstring=(char*)malloc(sizeof(char)); if(sstring == null) return null; tmp_realloc=sstring; while( (*(sstring+i-1)=(char)fgetc((file*)fh)) != 0x0 ) { /*reallocate more memory*/ tmp_realloc=(char*)realloc((char*)sstring,++i); /*if not same address copy old new & set old point new*/ if(tmp_realloc != sstring){ strcpy((char*)tmp_realloc,(char*)sstring); free(sstring); sstring=tmp_realloc; } } could tell me pointer causing issue (& reason) ? remove part /*if not same address copy old new & set old point new*/ if(tmp_realloc != sstring){ strc
Read more