Re: getting the database values of an object without changing the one in the current editing context
On 05.07.2007, at 13:46, WO Dev wrote: Actually I need it to save the previous object as a string (in fact an xml representation). So my process is to manipulate an object, and when I submit the changes, just before saveChanges, I'm tracking who did this, when, and the xml representation. That's why I'd like to get the database "state" of the object when I do te tracking part. You can use "snapshot()" to get the state, for which EOF thinks it is the current database state. If some other application changed it, this might be different from the actual values in the database. You could also use a raw sql query to get the current content from the database. I use "changesFromSnapshot" to collect only changes to the objects. My eo superclass does all that for me and creates a dictionary of changes when the object is saved. cug ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: getting the database values of an object without changing the one in the current editing context
Hello Ken, Xavier, EOF does this exact thing when it's deciding what has changed in your object, and what updates it needs to perform. It does this by using the snapshot, which is how I'd recommend you doing this as well. It would help if you clued us in to *why* you need it - so that answers could be crafted to your particular usage. Actually I need it to save the previous object as a string (in fact an xml representation). So my process is to manipulate an object, and when I submit the changes, just before saveChanges, I'm tracking who did this, when, and the xml representation. That's why I'd like to get the database "state" of the object when I do te tracking part. Xavier Ken On Jul 5, 2007, at 6:28 AM, WO Dev wrote: Hi, I'm not sure my subject is understandable, anyway. Assuming I have an object "x", I'm manipulating it in an editing context. At a certain point I need to get the original object (the one from the database) but without changing anything to the one in my editing context. How could I do that? I need the object in its globality, so if I can get the object directly and not a dictionary of its values it's better:) You can answer "bla bla project wonder":) but please point me to the correct method as I didn't find it for now;) Thanks, Xavier ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/kenlists% 40anderhome.com This email sent to [EMAIL PROTECTED] ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: getting the database values of an object without changing the one in the current editing context
On Jul 5, 2007, at 3:28 AM, WO Dev wrote: Hi, I'm not sure my subject is understandable, anyway. Assuming I have an object "x", I'm manipulating it in an editing context. At a certain point I need to get the original object (the one from the database) but without changing anything to the one in my editing context. How could I do that? I need the object in its globality, so if I can get the object directly and not a dictionary of its values it's better:) You can answer "bla bla project wonder":) but please point me to the correct method as I didn't find it for now;) What, exactly, is it that you need? You can't have two different versions of the same EO in the same EOF stack. Avoiding that is one of the central objectives of EOF. Do you need it as an object or just as a dictionary of values. If you need it as an EO, you can't have it. If you need just a dictionary of values, then which dictionary? The values the last time that EOF fetched it from the database (or successfully saved it to the database): NSDictionary valuesAsLastFetchedFromTheDatabase = eo.editingContext ().committedSnapshotForObject(eo); If you need a dictionary of the current values in the database, use EOUtilities.qualifierForEnterpriseObject and a fetch spec set for raw rows. Chuck -- Practical WebObjects - for developers who want to increase their overall knowledge of WebObjects or who are trying to solve specific problems. http://www.global-village.net/products/practical_webobjects ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: getting the database values of an object without changing the one in the current editing context
Hello Atze:), I could do that. Am I going to have issues if I try to create a local instance in my "current" editing context? I'll try that, thanks Xavier Xavier, maybe you should use a second EOEditingContext to fetch that „original“? Or you migrate to a second edcon before you start to modify? atze Am 05.07.2007 um 12:28 schrieb WO Dev: Hi, I'm not sure my subject is understandable, anyway. Assuming I have an object "x", I'm manipulating it in an editing context. At a certain point I need to get the original object (the one from the database) but without changing anything to the one in my editing context. How could I do that? I need the object in its globality, so if I can get the object directly and not a dictionary of its values it's better:) You can answer "bla bla project wonder":) but please point me to the correct method as I didn't find it for now;) Thanks, Xavier ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/atze% 40freeport.de This email sent to [EMAIL PROTECTED] Freeport & Soliversum Alexander Spohr [EMAIL PROTECTED] www.freeport.de ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: getting the database values of an object without changing the one in the current editing context
Thanks Cyryl, Well I was hoping not to have to deal with "I have to store the object somewhere before even knowing I might need it's previous state later";) Xavier WO Dev wrote: Hi, I'm not sure my subject is understandable, anyway. Assuming I have an object "x", I'm manipulating it in an editing context. At a certain point I need to get the original object (the one from the database) but without changing anything to the one in my editing context. How could I do that? I need the object in its globality, so if I can get the object directly and not a dictionary of its values it's better:) You can answer "bla bla project wonder":) but please point me to the correct method as I didn't find it for now;) one of the possible ways of doing that is to make object.snapshot() before changing it and after some time create new editing context , fetch the object into it and then do objectInTheNewEditingContext.updateFromSnapshot() changes would be made to the objectInTheNewEditingContext only -- Cyryl Plotnicki-Chudyk Software Developer Power Media S.A. http://www.power.com.pl District Court for Wroclaw-Fabryczna KRS: 281947 NIP: PL-898-16-47-572 Capital stock: 500 000 PLN ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: getting the database values of an object without changing the one in the current editing context
Xavier, EOF does this exact thing when it's deciding what has changed in your object, and what updates it needs to perform. It does this by using the snapshot, which is how I'd recommend you doing this as well. It would help if you clued us in to *why* you need it - so that answers could be crafted to your particular usage. Ken On Jul 5, 2007, at 6:28 AM, WO Dev wrote: Hi, I'm not sure my subject is understandable, anyway. Assuming I have an object "x", I'm manipulating it in an editing context. At a certain point I need to get the original object (the one from the database) but without changing anything to the one in my editing context. How could I do that? I need the object in its globality, so if I can get the object directly and not a dictionary of its values it's better:) You can answer "bla bla project wonder":) but please point me to the correct method as I didn't find it for now;) Thanks, Xavier ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/kenlists% 40anderhome.com This email sent to [EMAIL PROTECTED] ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: getting the database values of an object without changing the one in the current editing context
Xavier, maybe you should use a second EOEditingContext to fetch that „original“? Or you migrate to a second edcon before you start to modify? atze Am 05.07.2007 um 12:28 schrieb WO Dev: Hi, I'm not sure my subject is understandable, anyway. Assuming I have an object "x", I'm manipulating it in an editing context. At a certain point I need to get the original object (the one from the database) but without changing anything to the one in my editing context. How could I do that? I need the object in its globality, so if I can get the object directly and not a dictionary of its values it's better:) You can answer "bla bla project wonder":) but please point me to the correct method as I didn't find it for now;) Thanks, Xavier ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/atze% 40freeport.de This email sent to [EMAIL PROTECTED] Freeport & Soliversum Alexander Spohr [EMAIL PROTECTED] www.freeport.de ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: getting the database values of an object without changing the one in the current editing context
WO Dev wrote: Hi, I'm not sure my subject is understandable, anyway. Assuming I have an object "x", I'm manipulating it in an editing context. At a certain point I need to get the original object (the one from the database) but without changing anything to the one in my editing context. How could I do that? I need the object in its globality, so if I can get the object directly and not a dictionary of its values it's better:) You can answer "bla bla project wonder":) but please point me to the correct method as I didn't find it for now;) one of the possible ways of doing that is to make object.snapshot() before changing it and after some time create new editing context , fetch the object into it and then do objectInTheNewEditingContext.updateFromSnapshot() changes would be made to the objectInTheNewEditingContext only -- Cyryl Plotnicki-Chudyk Software Developer Power Media S.A. http://www.power.com.pl District Court for Wroclaw-Fabryczna KRS: 281947 NIP: PL-898-16-47-572 Capital stock: 500 000 PLN ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
getting the database values of an object without changing the one in the current editing context
Hi, I'm not sure my subject is understandable, anyway. Assuming I have an object "x", I'm manipulating it in an editing context. At a certain point I need to get the original object (the one from the database) but without changing anything to the one in my editing context. How could I do that? I need the object in its globality, so if I can get the object directly and not a dictionary of its values it's better:) You can answer "bla bla project wonder":) but please point me to the correct method as I didn't find it for now;) Thanks, Xavier ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
