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SPTableRelations.m
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SPTableRelations.m
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//
// SPTableRelations.m
// sequel-pro
//
// Created by Jim Knight on May 12, 2009.
// Copyright (c) 2009 Jim Knight. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
//
// More info at <https://github.com/sequelpro/sequelpro>
#import "SPTableRelations.h"
#import "SPDatabaseDocument.h"
#import "SPTablesList.h"
#import "SPTableData.h"
#import "SPTableView.h"
#import "SPAlertSheets.h"
#import "RegexKitLite.h"
#import "SPServerSupport.h"
#import <SPMySQL/SPMySQL.h>
static NSString *SPRemoveRelation = @"SPRemoveRelation";
static NSString *SPRelationNameKey = @"name";
static NSString *SPRelationColumnsKey = @"columns";
static NSString *SPRelationFKDatabaseKey = @"fk_database";
static NSString *SPRelationFKTableKey = @"fk_table";
static NSString *SPRelationFKColumnsKey = @"fk_columns";
static NSString *SPRelationOnUpdateKey = @"on_update";
static NSString *SPRelationOnDeleteKey = @"on_delete";
@interface SPTableRelations ()
- (void)_refreshRelationDataForcingCacheRefresh:(BOOL)clearAllCaches;
- (void)_updateAvailableTableColumns;
- (void)addAlertDidEnd:(NSAlert *)alert returnCode:(NSInteger)returnCode contextInfo:(void *)contextInfo;
@end
@implementation SPTableRelations
@synthesize connection;
@synthesize relationData;
#pragma mark -
#pragma mark Initialisation
- (id)init
{
if ((self = [super init])) {
relationData = [[NSMutableArray alloc] init];
prefs = [NSUserDefaults standardUserDefaults];
takenConstraintNames = [[NSMutableArray alloc] init];
}
return self;
}
/**
* Register to listen for table selection changes upon nib awakening.
*/
- (void)awakeFromNib
{
// Set the table relation view's vertical gridlines if required
[relationsTableView setGridStyleMask:([[NSUserDefaults standardUserDefaults] boolForKey:SPDisplayTableViewVerticalGridlines]) ? NSTableViewSolidVerticalGridLineMask : NSTableViewGridNone];
// Set the double-click action in blank areas of the table to create new rows
[relationsTableView setEmptyDoubleClickAction:@selector(addRelation:)];
// Set the strutcture and index view's font
BOOL useMonospacedFont = [[NSUserDefaults standardUserDefaults] boolForKey:SPUseMonospacedFonts];
CGFloat monospacedFontSize = [prefs floatForKey:SPMonospacedFontSize] > 0 ? [prefs floatForKey:SPMonospacedFontSize] : [NSFont smallSystemFontSize];
for (NSTableColumn *column in [relationsTableView tableColumns])
{
[[column dataCell] setFont:(useMonospacedFont) ? [NSFont fontWithName:SPDefaultMonospacedFontName size:monospacedFontSize] : [NSFont systemFontOfSize:[NSFont smallSystemFontSize]]];
}
// Register as an observer for the when the UseMonospacedFonts preference changes
[[NSUserDefaults standardUserDefaults] addObserver:self forKeyPath:SPUseMonospacedFonts options:NSKeyValueObservingOptionNew context:NULL];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(tableSelectionChanged:)
name:SPTableChangedNotification
object:tableDocumentInstance];
// Add observers for document task activity
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(startDocumentTaskForTab:)
name:SPDocumentTaskStartNotification
object:tableDocumentInstance];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(endDocumentTaskForTab:)
name:SPDocumentTaskEndNotification
object:tableDocumentInstance];
}
#pragma mark -
#pragma mark IB action methods
/**
* Opens the relation sheet, in its current state (without any reset of fields)
*/
- (IBAction)openRelationSheet:(id)sender
{
[NSApp beginSheet:addRelationPanel
modalForWindow:[tableDocumentInstance parentWindow]
modalDelegate:self
didEndSelector:nil
contextInfo:nil];
}
/**
* Closes the relation sheet.
*/
- (IBAction)closeRelationSheet:(id)sender
{
[NSApp endSheet:addRelationPanel returnCode:0];
[addRelationPanel orderOut:self];
}
/**
* Add a new relation using the selected values.
*/
- (IBAction)confirmAddRelation:(id)sender
{
[dataProgressIndicator startAnimation:self];
[dataProgressIndicator setHidden:NO];
NSString *thisTable = [tablesListInstance tableName];
NSString *thisColumn = [columnPopUpButton titleOfSelectedItem];
NSString *thatTable = [refTablePopUpButton titleOfSelectedItem];
NSString *thatColumn = [refColumnPopUpButton titleOfSelectedItem];
NSString *query = [NSString stringWithFormat:@"ALTER TABLE %@ ADD ",[thisTable backtickQuotedString]];
// Set constraint name?
if ([[constraintName stringValue] length] > 0) {
query = [query stringByAppendingString:[NSString stringWithFormat:@"CONSTRAINT %@ ", [[constraintName stringValue] backtickQuotedString]]];
}
query = [query stringByAppendingString:[NSString stringWithFormat:@"FOREIGN KEY (%@) REFERENCES %@ (%@)",
[thisColumn backtickQuotedString],
[thatTable backtickQuotedString],
[thatColumn backtickQuotedString]]];
NSArray *onActions = @[@"RESTRICT", @"CASCADE", @"SET NULL", @"NO ACTION"];
// If required add ON DELETE
if ([onDeletePopUpButton selectedTag] >= 0) {
query = [query stringByAppendingString:[NSString stringWithFormat:@" ON DELETE %@", [onActions objectAtIndex:[onDeletePopUpButton selectedTag]]]];
}
// If required add ON UPDATE
if ([onUpdatePopUpButton selectedTag] >= 0) {
query = [query stringByAppendingString:[NSString stringWithFormat:@" ON UPDATE %@", [onActions objectAtIndex:[onUpdatePopUpButton selectedTag]]]];
}
// Execute query
[connection queryString:query];
[dataProgressIndicator setHidden:YES];
[dataProgressIndicator stopAnimation:self];
[self closeRelationSheet:self];
if ([connection queryErrored]) {
// Retrieve the last connection error message.
NSString *errorText = [connection lastErrorMessage];
NSAlert *alert = [[[NSAlert alloc] init] autorelease];
[alert setMessageText:NSLocalizedString(@"Error creating relation", @"error creating relation message")];
[alert addButtonWithTitle:NSLocalizedString(@"OK", @"OK button")];
[alert setInformativeText:[NSString stringWithFormat:NSLocalizedString(@"The specified relation could not be created.\n\nMySQL said: %@", @"error creating relation informative message"), errorText]];
// An error ID of 1005 indicates a foreign key error. These are thrown for many reasons, but the two
// most common are 121 (name probably in use) and 150 (types don't exactly match).
// Retrieve the InnoDB status and extract the most recent error for more helpful text.
if ([connection lastErrorID] == 1005) {
SPInnoDBStatusQueryFormat status = [[tableDocumentInstance serverSupport] innoDBStatusQuery];
if(status.queryString) {
NSString *statusText = [[[connection queryString:status.queryString] getRowAsArray] objectAtIndex:status.columnIndex];
NSString *detailErrorString = [statusText stringByMatching:@"latest foreign key error\\s+-----*\\s+[0-9: ]*(.*?)\\s+-----" options:(RKLCaseless | RKLDotAll) inRange:NSMakeRange(0, [statusText length]) capture:1L error:NULL];
if (detailErrorString) {
[alert setAccessoryView:detailErrorView];
[detailErrorText setString:[detailErrorString stringByReplacingOccurrencesOfString:@"\n" withString:@" "]];
}
// Detect name duplication if appropriate
if ([errorText isMatchedByRegex:@"errno: 121"] && [errorText isMatchedByRegex:@"already exists"]) {
[takenConstraintNames addObject:[[constraintName stringValue] lowercaseString]];
[self controlTextDidChange:[NSNotification notificationWithName:@"dummy" object:constraintName]];
}
}
}
[[alert onMainThread] beginSheetModalForWindow:[tableDocumentInstance parentWindow] modalDelegate:self didEndSelector:@selector(addAlertDidEnd:returnCode:contextInfo:) contextInfo:NULL];
}
else {
[self _refreshRelationDataForcingCacheRefresh:YES];
}
}
- (void)addAlertDidEnd:(NSAlert *)alert returnCode:(NSInteger)returnCode contextInfo:(void *)contextInfo
{
[self performSelector:@selector(openRelationSheet:) withObject:self afterDelay:0.0];
}
/**
* Updates the available columns when the user selects a table.
*/
- (IBAction)selectTableColumn:(id)sender
{
[self _updateAvailableTableColumns];
}
/**
* Updates the available columns when the user selects a table.
*/
- (IBAction)selectReferenceTable:(id)sender
{
[self _updateAvailableTableColumns];
}
/**
* Called whenever the user selected to add a new relation.
*/
- (IBAction)addRelation:(id)sender
{
// Check whether table editing is permitted (necessary as some actions - eg table double-click - bypass validation)
if ([tableDocumentInstance isWorking] || [tablesListInstance tableType] != SPTableTypeTable) return;
// Set up the controls
[addRelationTableBox setTitle:[NSString stringWithFormat:NSLocalizedString(@"Table: %@", @"Add Relation sheet title, showing table name"), [tablesListInstance tableName]]];
[columnPopUpButton removeAllItems];
NSArray *columnTitles = ([prefs boolForKey:SPAlphabeticalTableSorting])? [[tableDataInstance columnNames] sortedArrayUsingSelector:@selector(compare:)] : [tableDataInstance columnNames];
[columnPopUpButton addItemsWithTitles:columnTitles];
[refTablePopUpButton removeAllItems];
BOOL changeEncoding = ![[connection encoding] isEqualToString:@"utf8"];
// Use UTF8 for identifier-based queries
if (changeEncoding) {
[connection storeEncodingForRestoration];
[connection setEncoding:@"utf8"];
}
// Get all InnoDB tables in the current database
// TODO: MySQL 4 compatibility
SPMySQLResult *result = [connection queryString:[NSString stringWithFormat:@"SELECT table_name FROM information_schema.tables WHERE table_type = 'BASE TABLE' AND engine = 'InnoDB' AND table_schema = %@", [[tableDocumentInstance database] tickQuotedString]]];
[result setDefaultRowReturnType:SPMySQLResultRowAsArray];
for (NSArray *eachRow in result) {
[refTablePopUpButton addItemWithTitle:[eachRow objectAtIndex:0]];
}
// Reset other fields
[constraintName setStringValue:@""];
[onDeletePopUpButton selectItemAtIndex:0];
[onUpdatePopUpButton selectItemAtIndex:0];
// Restore encoding if appropriate
if (changeEncoding) [connection restoreStoredEncoding];
[self selectReferenceTable:nil];
[self openRelationSheet:self];
}
/**
* Removes the selected relations.
*/
- (IBAction)removeRelation:(id)sender
{
if ([relationsTableView numberOfSelectedRows] > 0) {
NSAlert *alert = [NSAlert alertWithMessageText:NSLocalizedString(@"Delete relation", @"delete relation message")
defaultButton:NSLocalizedString(@"Delete", @"delete button")
alternateButton:NSLocalizedString(@"Cancel", @"cancel button")
otherButton:nil
informativeTextWithFormat:NSLocalizedString(@"Are you sure you want to delete the selected relations? This action cannot be undone.", @"delete selected relation informative message")];
[alert setAlertStyle:NSCriticalAlertStyle];
NSArray *buttons = [alert buttons];
// Change the alert's cancel button to have the key equivalent of return
[[buttons objectAtIndex:0] setKeyEquivalent:@"d"];
[[buttons objectAtIndex:0] setKeyEquivalentModifierMask:NSCommandKeyMask];
[[buttons objectAtIndex:1] setKeyEquivalent:@"\r"];
[alert beginSheetModalForWindow:[tableDocumentInstance parentWindow] modalDelegate:self didEndSelector:@selector(alertDidEnd:returnCode:contextInfo:) contextInfo:SPRemoveRelation];
}
}
/**
* Trigger a refresh of the displayed relations via the interface.
*/
- (IBAction)refreshRelations:(id)sender
{
[self _refreshRelationDataForcingCacheRefresh:YES];
}
/**
* Called whenever the user selects a different table.
*/
- (void)tableSelectionChanged:(NSNotification *)notification
{
BOOL enableInteraction = ![[tableDocumentInstance selectedToolbarItemIdentifier] isEqualToString:SPMainToolbarTableRelations] || ![tableDocumentInstance isWorking];
// To begin enable all interface elements
[addRelationButton setEnabled:enableInteraction];
[refreshRelationsButton setEnabled:enableInteraction];
[relationsTableView setEnabled:YES];
// Get the current table's storage engine
NSString *engine = [tableDataInstance statusValueForKey:@"Engine"];
if (([tablesListInstance tableType] == SPTableTypeTable) && ([[engine lowercaseString] isEqualToString:@"innodb"])) {
// Update the text label
[labelTextField setStringValue:[NSString stringWithFormat:NSLocalizedString(@"Relations for table: %@", @"Relations tab subtitle showing table name"), [tablesListInstance tableName]]];
[addRelationButton setEnabled:enableInteraction];
[refreshRelationsButton setEnabled:enableInteraction];
[relationsTableView setEnabled:YES];
}
else {
[addRelationButton setEnabled:NO];
[refreshRelationsButton setEnabled:NO];
[relationsTableView setEnabled:NO];
[labelTextField setStringValue:([tablesListInstance tableType] == SPTableTypeTable) ? NSLocalizedString(@"This table currently does not support relations. Only tables that use the InnoDB storage engine support them.", @"This table currently does not support relations. Only tables that use the InnoDB storage engine support them.") : @""];
}
[self _refreshRelationDataForcingCacheRefresh:NO];
}
#pragma mark -
#pragma mark TextField delegate methods
- (void)controlTextDidChange:(NSNotification *)notification
{
// Make sure the user does not enter a taken name, using the quickly-generated incomplete list
if ([notification object] == constraintName) {
NSString *userValue = [[constraintName stringValue] lowercaseString];
// Make field red and disable add button
if ([takenConstraintNames containsObject:userValue]) {
[constraintName setTextColor:[NSColor redColor]];
[confirmAddRelationButton setEnabled:NO];
}
else {
[constraintName setTextColor:[NSColor controlTextColor]];
[confirmAddRelationButton setEnabled:YES];
}
}
}
#pragma mark -
#pragma mark Tableview datasource methods
- (NSInteger)numberOfRowsInTableView:(NSTableView *)tableView
{
return [relationData count];
}
- (id)tableView:(NSTableView *)tableView objectValueForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)rowIndex
{
id data = [[relationData objectAtIndex:rowIndex] objectForKey:[tableColumn identifier]];
//dim the database name if it matches the current database
if([[tableColumn identifier] isEqualToString:SPRelationFKDatabaseKey] && [[tableDocumentInstance database] isEqual:data]) {
NSDictionary *textAttributes = @{NSForegroundColorAttributeName: [NSColor lightGrayColor]};
data = [[[NSAttributedString alloc] initWithString:(NSString *)data attributes:textAttributes] autorelease];
}
return data;
}
#pragma mark -
#pragma mark Tableview delegate methods
/**
* Called whenever the relations table view selection changes.
*/
- (void)tableViewSelectionDidChange:(NSNotification *)notification
{
[removeRelationButton setEnabled:([relationsTableView numberOfSelectedRows] > 0)];
}
/*
* Double-click action on table cells - for the time being, return
* NO to disable editing.
*/
- (BOOL)tableView:(NSTableView *)tableView shouldEditTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)rowIndex
{
if ([tableDocumentInstance isWorking]) return NO;
return NO;
}
/**
* Disable row selection while the document is working.
*/
- (BOOL)tableView:(NSTableView *)tableView shouldSelectRow:(NSInteger)rowIndex
{
return ![tableDocumentInstance isWorking];
}
#pragma mark -
#pragma mark Task interaction
/**
* Disable all content interactive elements during an ongoing task.
*/
- (void)startDocumentTaskForTab:(NSNotification *)aNotification
{
// Only proceed if this view is selected.
if (![[tableDocumentInstance selectedToolbarItemIdentifier] isEqualToString:SPMainToolbarTableRelations]) return;
[addRelationButton setEnabled:NO];
[refreshRelationsButton setEnabled:NO];
[removeRelationButton setEnabled:NO];
}
/**
* Enable all content interactive elements after an ongoing task.
*/
- (void)endDocumentTaskForTab:(NSNotification *)aNotification
{
// Only proceed if this view is selected.
if (![[tableDocumentInstance selectedToolbarItemIdentifier] isEqualToString:SPMainToolbarTableRelations]) return;
if ([relationsTableView isEnabled]) {
[addRelationButton setEnabled:YES];
[refreshRelationsButton setEnabled:YES];
}
[removeRelationButton setEnabled:([relationsTableView numberOfSelectedRows] > 0)];
}
#pragma mark -
#pragma mark Other
/**
* Returns an array of relation data to be used for printing purposes. The first element in the array is always
* an array of the columns and each subsequent element is an array of relation data.
*/
- (NSArray *)relationDataForPrinting
{
NSMutableArray *headings = [[NSMutableArray alloc] init];
NSMutableArray *data = [NSMutableArray array];
// Get the relations table view's columns
for (NSTableColumn *column in [relationsTableView tableColumns])
{
[headings addObject:[[column headerCell] stringValue]];
}
[data addObject:headings];
[headings release];
// Get the relation data
for (NSDictionary *eachRelation in relationData)
{
NSMutableArray *temp = [[NSMutableArray alloc] init];
[temp addObject:[eachRelation objectForKey:SPRelationNameKey]];
[temp addObject:[eachRelation objectForKey:SPRelationColumnsKey]];
[temp addObject:[eachRelation objectForKey:SPRelationFKTableKey]];
[temp addObject:[eachRelation objectForKey:SPRelationFKColumnsKey]];
[temp addObject:([eachRelation objectForKey:SPRelationOnUpdateKey]) ? [eachRelation objectForKey:SPRelationOnUpdateKey] : @""];
[temp addObject:([eachRelation objectForKey:SPRelationOnDeleteKey]) ? [eachRelation objectForKey:SPRelationOnDeleteKey] : @""];
[data addObject:temp];
[temp release];
}
return data;
}
/**
* NSAlert didEnd method.
*/
- (void)alertDidEnd:(NSAlert *)alert returnCode:(NSInteger)returnCode contextInfo:(NSString *)contextInfo
{
if ([contextInfo isEqualToString:SPRemoveRelation]) {
if (returnCode == NSAlertDefaultReturn) {
NSString *thisTable = [tablesListInstance tableName];
NSIndexSet *selectedSet = [relationsTableView selectedRowIndexes];
NSUInteger row = [selectedSet lastIndex];
while (row != NSNotFound)
{
NSString *relationName = [[relationData objectAtIndex:row] objectForKey:SPRelationNameKey];
NSString *query = [NSString stringWithFormat:@"ALTER TABLE %@ DROP FOREIGN KEY %@", [thisTable backtickQuotedString], [relationName backtickQuotedString]];
[connection queryString:query];
if ([connection queryErrored]) {
SPBeginAlertSheet(NSLocalizedString(@"Unable to delete relation", @"error deleting relation message"),
NSLocalizedString(@"OK", @"OK button"),
nil, nil, [NSApp mainWindow], nil, nil, nil,
[NSString stringWithFormat:NSLocalizedString(@"The selected relation couldn't be deleted.\n\nMySQL said: %@", @"error deleting relation informative message"), [connection lastErrorMessage]]);
// Abort loop
break;
}
row = [selectedSet indexLessThanIndex:row];
}
[self _refreshRelationDataForcingCacheRefresh:YES];
}
}
}
/**
* This method is called as part of Key Value Observing which is used to watch for prefernce changes which effect the interface.
*/
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
{
// Display table veiew vertical gridlines preference changed
if ([keyPath isEqualToString:SPDisplayTableViewVerticalGridlines]) {
[relationsTableView setGridStyleMask:([[change objectForKey:NSKeyValueChangeNewKey] boolValue]) ? NSTableViewSolidVerticalGridLineMask : NSTableViewGridNone];
}
// Use monospaced fonts preference changed
else if ([keyPath isEqualToString:SPUseMonospacedFonts]) {
BOOL useMonospacedFont = [[change objectForKey:NSKeyValueChangeNewKey] boolValue];
CGFloat monospacedFontSize = [prefs floatForKey:SPMonospacedFontSize] > 0 ? [prefs floatForKey:SPMonospacedFontSize] : [NSFont smallSystemFontSize];
for (NSTableColumn *column in [relationsTableView tableColumns])
{
[[column dataCell] setFont:(useMonospacedFont) ? [NSFont fontWithName:SPDefaultMonospacedFontName size:monospacedFontSize] : [NSFont systemFontOfSize:[NSFont smallSystemFontSize]]];
}
[relationsTableView reloadData];
}
}
/**
* Menu validation
*/
- (BOOL)validateMenuItem:(NSMenuItem *)menuItem
{
// Remove row
if ([menuItem action] == @selector(removeRelation:)) {
[menuItem setTitle:([relationsTableView numberOfSelectedRows] > 1) ? NSLocalizedString(@"Delete Relations", @"delete relations menu item") : NSLocalizedString(@"Delete Relation", @"delete relation menu item")];
return ([relationsTableView numberOfSelectedRows] > 0);
}
return YES;
}
#pragma mark -
#pragma mark Private API
/**
* Refresh the displayed relations, optionally forcing a refresh of the underlying cache.
*/
- (void)_refreshRelationDataForcingCacheRefresh:(BOOL)clearAllCaches
{
[relationData removeAllObjects];
// Prepare the list of the used constraint names for this table. Ideally this would include all the used names
// in the database, but the MySQL-provided method of requesting that information (table_constraints in
// information_schema) is generated live from db file scans, which cannot be cheaply done on servers with
// many databases.
[takenConstraintNames removeAllObjects];
if ([tablesListInstance tableType] == SPTableTypeTable) {
if (clearAllCaches) [tableDataInstance updateInformationForCurrentTable];
NSArray *constraints = [tableDataInstance getConstraints];
for (NSDictionary *constraint in constraints)
{
[relationData addObject:[NSDictionary dictionaryWithObjectsAndKeys:
[constraint objectForKey:SPRelationNameKey], SPRelationNameKey,
[[constraint objectForKey:SPRelationColumnsKey] componentsJoinedByCommas], SPRelationColumnsKey,
[constraint objectForKey:@"ref_database"] ? [constraint objectForKey:@"ref_database"] : [tableDocumentInstance database], SPRelationFKDatabaseKey,
[constraint objectForKey:@"ref_table"], SPRelationFKTableKey,
[[constraint objectForKey:@"ref_columns"] componentsJoinedByCommas], SPRelationFKColumnsKey,
([constraint objectForKey:@"update"] ? [constraint objectForKey:@"update"] : @""), SPRelationOnUpdateKey,
([constraint objectForKey:@"delete"] ? [constraint objectForKey:@"delete"] : @""), SPRelationOnDeleteKey,
nil]];
[takenConstraintNames addObject:[[constraint objectForKey:SPRelationNameKey] lowercaseString]];
}
}
[relationsTableView reloadData];
}
/**
* Updates the available table columns that the reference is pointing to. Available columns are those that are
* within the selected table and are of the same data type as the column the reference is from.
*/
- (void)_updateAvailableTableColumns
{
NSString *column = [columnPopUpButton titleOfSelectedItem];
NSString *table = [refTablePopUpButton titleOfSelectedItem];
[tableDataInstance resetAllData];
[tableDataInstance updateInformationForCurrentTable];
NSDictionary *columnInfo = [[tableDataInstance columnWithName:column] copy];
[refColumnPopUpButton setEnabled:NO];
[confirmAddRelationButton setEnabled:NO];
[refColumnPopUpButton removeAllItems];
[tableDataInstance resetAllData];
NSDictionary *tableInfo = [tableDataInstance informationForTable:table];
NSArray *columns = [tableInfo objectForKey:@"columns"];
NSMutableArray *validColumns = [NSMutableArray array];
// Only add columns of the same data type
for (NSDictionary *aColumn in columns)
{
if ([[columnInfo objectForKey:@"type"] isEqualToString:[aColumn objectForKey:@"type"]]) {
[validColumns addObject:[aColumn objectForKey:SPRelationNameKey]];
}
}
// Add the valid columns
if ([validColumns count] > 0) {
NSArray *columnTitles = ([prefs boolForKey:SPAlphabeticalTableSorting])? [validColumns sortedArrayUsingSelector:@selector(compare:)] : validColumns;
[refColumnPopUpButton addItemsWithTitles:columnTitles];
[refColumnPopUpButton setEnabled:YES];
[confirmAddRelationButton setEnabled:YES];
}
[columnInfo release];
}
#pragma mark -
- (void)dealloc
{
[[NSNotificationCenter defaultCenter] removeObserver:self];
[[NSUserDefaults standardUserDefaults] removeObserver:self forKeyPath:SPUseMonospacedFonts];
SPClear(relationData);
SPClear(takenConstraintNames);
[super dealloc];
}
@end