February 2019 - Pharo-users

Re: [Pharo-users] Why DirectoryIsNotEmpty on FileReference>>deleteAll ?
by Alistair Grant Feb. 6, 2019

Feb. 6, 2019

Hi Albrecht, On Tue, 5 Feb 2019 at 15:26, Albrecht Baur <baur.albrecht(a)googlemail.com> wrote: > > Hi Alistair, > > here the system report output: > > ... Thanks for the info. Please see: Issue: https://github.com/OpenSmalltalk/opensmalltalk-vm/issues/368 PR: https://github.com/OpenSmalltalk/opensmalltalk-vm/pull/371 Assuming the CI build passes, I'll wait a day or so to give the VM guys a chance to review the changes and comment before merging. Cheers, Alistair

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Re: [Pharo-users] SQLite3 [UDBC2] - "Could not coerce arguments" error for UTF8 chars
by Pierce Ng Feb. 6, 2019

Feb. 6, 2019

On Tue, Feb 05, 2019 at 08:20:22PM +0100, Petr Fischer via Pharo-users wrote: > But still... I do not expect anyone to create tables through binding > values (like in your example), so following SQL command is still > broken: > db execute: 'create table A (ID INTEGER, T TEXT DEFAULT ''Ã¡ÄÅ¡ÅÄÃ¡'')'. Your original mail was about insert, not create. Anyhow, I think I see the problem: SQLite's APIs accept UTF8-encoded SQL input strings. UDBCSQLite just uses UFFI's String to char* conversion to pass strings in Pharo to the FFI calls. But 'Ã¡ÄÅ¡ÅÄÃ¡' is a WideString. Judiciously sending #utf8Encoded to the input SQL string seems to do the trick. | db | db := UDBCSQLite3Connection openOn: '/tmp/u.db'. [ | rs | db execute: 'create table a (k, v varchar default ''ÄÅ¡ÄÅÅ¾Ã½Ã¡ÃÃ©ÃºÅ¯ÄÅ ÄÅÅ½ÃÃÃÃÃÅ®'')'. db execute: 'insert into a (k) values (NULL)'. rs := db execute: 'select k, v from a'. rs next inspect. ] ensure: [ db close ] Above snippet evaluates to an inspector on a UDBCSQLite3Row instance with the expected data. See screenshot. I should be able to fix this in UDBCSQLite over the next two days as it is Chinese New Year long holiday here. Btw, you mentioned UDBC2. Not speaking for Torsten but I believe UDBC2 is WIP experimental stuff. Better to use UDBCSQLite. Easiest way to load is to install GlorpSQLite via the Catalog Browser. Ignore the warning that the package is not tested for Pharo 7 - that's a Catalog Browser bug.

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Re: [Pharo-users] SQLite3 [UDBC2] - "Could not coerce arguments" error for UTF8 chars
by Pierce Ng Feb. 5, 2019

Feb. 5, 2019

On Tue, Feb 05, 2019 at 02:51:42PM +0000, Petr Fischer via Pharo-users wrote: > When I executing this insert SQL command: > insert into "TABLE" (..., "VARCHAR_FIELD") values (..., 'ÄÅ¡ÄÅÅ¾Ã½Ã¡ÃÃ©ÃºÅ¯ÄÅ ÄÅÅ½ÃÃÃÃÃÅ®'); > this UDBC error occurs (what's wrong?): > Error: "Could not coerce arguments" Please show complete code. Below code completes without error. | db | db := UDBCSQLite3Connection openOn: '/tmp/u.db'. [ db basicExecute: 'create table x (xv varchar)'. db execute: 'insert into x values (?)' with: (Array with: 'ÄÅ¡ÄÅÅ¾Ã½Ã¡ÃÃ©ÃºÅ¯ÄÅ ÄÅÅ½ÃÃÃÃÃÅ®'). ] ensure: [ db close ] Below checks the database outside Pharo. % sqlite3 /tmp/u.db SQLite version 3.26.0 2018-12-01 12:34:55 Enter ".help" for usage hints. sqlite> .tables x sqlite> .schema x CREATE TABLE x (xv varchar); sqlite> .header on sqlite> select xv from x; xv ÄÅ¡ÄÅÅ¾Ã½Ã¡ÃÃ©ÃºÅ¯ÄÅ ÄÅÅ½ÃÃÃÃÃÅ® sqlite>

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word wrap in Transcript
by test email Feb. 5, 2019

Feb. 5, 2019

Is there a way to word-wrap info in the Transcript object?

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Github pharo-* organizations
by Pierce Ng Feb. 5, 2019

Feb. 5, 2019

Hi all, Is there a definitive list of all the pharo-* organizations on GH? Like pharo-rdbms, pharo-nosql, pharo-vcs, ... Or, a way to query GH to find out? Pierce

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package extensions in Pharo 7.
by PAUL DEBRUICKER Feb. 5, 2019

Feb. 5, 2019

Hi - Is there a way to create the protocol, then convert it to an extension, without adding a method to it between the time I create the protocol and convert it to an extension? Seems like it if the protocol is empty when I convert it to an extension it gets deleted rather than converted. Would anyone be interested in having the thing that parses protocol names automatically create extension protocols from names that start with * instead of rejecting them immediately? IS the new extension stuff cross platform compatible right now or do I have to do anything else to port these methods & protocols to Squeak and GemStone? Thanks Paul

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Iliad on Pharo 7.0
by Siemen Baader Feb. 5, 2019

Feb. 5, 2019

Hi, is anyone planning to port Iliad to Pharo 7.0? The Grease package seams to have been removed from 7.0 so Iliad does not work out of the box. cheers, Siemen

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SQLite3 [UDBC2] - "Could not coerce arguments" error for UTF8 chars
by Petr Fischer Feb. 5, 2019

Feb. 5, 2019

Hello, there is a little mess in SQLite 3 drivers for Pharo, so I am using Pharo 7 and newest UDBC2 sqlite driver from here: http://smalltalkhub.com/#!/~TorstenBergmann/UDBC2 When I executing this insert SQL command: insert into "TABLE" (..., "VARCHAR_FIELD") values (..., 'ÄÅ¡ÄÅÅ¾Ã½Ã¡ÃÃ©ÃºÅ¯ÄÅ ÄÅÅ½ÃÃÃÃÃÅ®'); this UDBC error occurs (what's wrong?): Error: "Could not coerce arguments" Stack: ExternalLibraryFunction(Object)>>error: ExternalLibraryFunction(Object)>>externalCallFailed ExternalLibraryFunction(ExternalFunction)>>invokeWithArguments: UDBCSQLite3Library>>apiPrepare:withSQLText:with:with:with: UDBCSQLite3Library>>prepare:on:with: UDBCSQLite3Connection(UDBCSQLite3BaseConnection)>>prepare: UDBCSQLite3ResultSet>>prepareStatement: UDBCSQLite3ResultSet>>execute:withCollection: UDBCSQLite3ResultSet>>execute:with:on: UDBCSQLite3Connection>>execute:with: UDBCSQLite3Connection>>execute: ... Thanks, pf

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[ANN] Pharo Sprints first half 2019
by Marcus Denker Feb. 5, 2019

Feb. 5, 2019

We organise one Pharo âSprintâ per month were we meet to work on boring issue tracker entries together. Goals of the next sprints: - Fix issues for Pharo8 - Backport important fixes to Pharo7 Remotely, you can join us on Discord. During the sprint, we will try to synchronize local and remote Pharo sprinters. In the past people organised local sprints at the same time (e.g. Santiago/Chile). See here for more infos: http://pharo.org/contribute-events There will be an event on the association website for each sprint. The next dates are: - 22 Feb https://association.pharo.org/event-3253818 - 29 Mar https://association.pharo.org/event-3253842 - 26 Apr https://association.pharo.org/event-3253846 - 31 May https://association.pharo.org/event-3253848 - 28 Jun https://association.pharo.org/event-3253850 For more Pharo Event, have a look at the Events Page: https://association.pharo.org/events

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Re: [Pharo-users] How to intercept instvar write - MetaLinks + anonymous subclass problem
by Marcus Denker Feb. 5, 2019

Feb. 5, 2019

> > Thanks for answer! I want to detect instvar writes only for objects (instances), that was previously fetched from external "datastore" (DB like), so I can persist changed objects only back to the datastore at the end of transaction. These objects can be any existing class (Pharo classes, some 3rd party libs classes, everything), so 1) injecting a class is overkill (affects all objects in the image) 2) impossible to rewrite #class method for every existing class. > > Injecting object-centric metalinks via anonymous subclass breaks up many things, when I want to treat injected object like any othres (IMHO). > > If you will be able to avoid this issue, that would be extra cool :-] > > Note: for now, best for my "instvar writes detection" would be probably hack Object>>#attemptToAssign:withIndex: or ProtoObject>>#modificationForbiddenFor:index:value: and make my "datastore fetched objects" read only (via Object>>#setIsReadOnlyObject:). > The read-only approach has the nice property that it works for collections, too. The meta-link model falls short there (you can not âput a link on offset 4 in this arrayâ, but would need to put it on at:put:) I started to play with it to see what is needed to create a generalised change detector with read only: https://github.com/MarcusDenker/ChangeDetector Marcus

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