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| Amending / Adding to a JSON array |
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| lonesheep |
 Posted: Fri Oct 12, 2018 5:21 am Post subject: Amending / Adding to a JSON array |
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Novice
Joined: 12 Sep 2017
Posts: 21
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Given the following JSON strcuture, if I wanted to add another address to 'fred', any idea how I do it?
Level 1 {Array}
Firstname fred
Level 2
Address {Array}
Level 3
Building No 1
Street High Street
Level 3
Building No 2
Street Station Road
Firstname bob
Level 2
Address {Array}
Level 3
Building No 1
Street High Street
I'm assuming I need to get a reference to the JSON Array at Address {Level 2}, but I have no idea how to do this? I've used the following to check for the existance of the block, but I can't see to amend it.
IF EXISTS(SELECT ITEM NAME from refOutNamesArray.Item[] as NAME where NAME.Firstname = 'fred') = TRUE THEN
-- Add an address..
END IF;
To add the address I tried this...
DECLARE refName REFERENCE TO OutputRoot;
SET refName = THE (SELECT ITEM NAME from refOutNamesArray.Item[] as NAME where NAME.Firstname = 'fred';
DECLARE countAddress INT CARDINALITY(refName.Address.Item[]);
SET (refName.Address.Item[countAddress+1].Street = 'Another One';
Alias, not good. I can't see to find any information on how to do this online. Any ideas? |
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| Vitor |
| Posted: Fri Oct 12, 2018 5:57 am Post subject: Re: Amending / Adding to a JSON array |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| lonesheep wrote: |
I'm assuming I need to get a reference to the JSON Array at Address {Level 2}, but I have no idea how to do this? I've used the following to check for the existance of the block, but I can't see to amend it.
IF EXISTS(SELECT ITEM NAME from refOutNamesArray.Item[] as NAME where NAME.Firstname = 'fred') = TRUE THEN
-- Add an address..
END IF;
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If it was me, I'd do something like:
| Code: |
MOVE refName FIRSTCHILD refOutNamesArray NAME 'NAME';
WHILE LASTMOVE(refName) DO
IF FIELDVALUE(refName) = 'fred' THEN;
MOVE refAddress FIRSTCHILD NAME 'Address';
CREATE NEXTSIBLING OF refAddress AS refAddress;
SET refAddress.<etc, etc>
END IF;
MOVE refName NEXTSIBLING;
END DO;
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All code untested, posted as-is with no liability express or implied accepted for any loss or damage howsoever caused and on the understanding I've had so very much coffee this morning.
| lonesheep wrote: |
To add the address I tried this...
DECLARE refName REFERENCE TO OutputRoot;
SET refName = THE (SELECT ITEM NAME from refOutNamesArray.Item[] as NAME where NAME.Firstname = 'fred';
DECLARE countAddress INT CARDINALITY(refName.Address.Item[]);
SET (refName.Address.Item[countAddress+1].Street = 'Another One';
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Never use CARDINALITY.
_________________
Honesty is the best policy.
Insanity is the best defence. |
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