Re: [Django] #22424: Default value for TextField

[Django]

#22424: Default value for TextField
-+-
 Reporter:  Nevsky   |Owner:  Loic
 Type:  Bug  |  Bistuer 
Component:  Migrations   |   Status:  closed
 Severity:  Release blocker  |  Version:
 Keywords:   |  1.7-beta-1
Has patch:  0|   Resolution:  fixed
  Needs tests:  0| Triage Stage:  Accepted
Easy pickings:  0|  Needs documentation:  0
 |  Patch needs improvement:  0
 |UI/UX:  0
-+-

Comment (by Tim Graham ):

 In [changeset:"d61b6224b09cb2aa6fb75ccecab246f91553ef7b"]:
 {{{
 #!CommitTicketReference repository=""
 revision="d61b6224b09cb2aa6fb75ccecab246f91553ef7b"
 [1.7.x] Fixed #22424 -- Fixed handling of default values for
 TextField/BinaryField on MySQL.

 Thanks syphar for the review and suggestions.

 Backport of 1d3d01b4f7 from master
 }}}

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Re: [Django] #22424: Default value for TextField

[Django]

#22424: Default value for TextField
-+-
 Reporter:  Nevsky   |Owner:  Loic
 Type:  Bug  |  Bistuer 
Component:  Migrations   |   Status:  closed
 Severity:  Release blocker  |  Version:
 Keywords:   |  1.7-beta-1
Has patch:  0|   Resolution:  fixed
  Needs tests:  0| Triage Stage:  Accepted
Easy pickings:  0|  Needs documentation:  0
 |  Patch needs improvement:  0
 |UI/UX:  0
-+-

Comment (by Tim Graham ):

 In [changeset:"1a29675d76de00d6fad9b366fc66e8b6d541c3b6"]:
 {{{
 #!CommitTicketReference repository=""
 revision="1a29675d76de00d6fad9b366fc66e8b6d541c3b6"
 [1.7.x] Fixed #22626 -- Allow BinaryField defaults with SQlite.

 Also fixes a slight issue in sqlite3.schema._remake_table where
 default values where quoted with "column name" quoting rules.

 Reference for quoting: http://www.sqlite.org/lang_expr.html

 Thanks Shai Berger for the review. Refs #22424.

 Backport of 6aacb4c991 from master
 }}}

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Re: [Django] #22424: Default value for TextField

[Django]

#22424: Default value for TextField
-+-
 Reporter:  Nevsky   |Owner:  Loic
 Type:  Bug  |  Bistuer 
Component:  Migrations   |   Status:  closed
 Severity:  Release blocker  |  Version:
 Keywords:   |  1.7-beta-1
Has patch:  0|   Resolution:  fixed
  Needs tests:  0| Triage Stage:  Accepted
Easy pickings:  0|  Needs documentation:  0
 |  Patch needs improvement:  0
 |UI/UX:  0
-+-

Comment (by Andrew Godwin ):

 In [changeset:"4e32e47348473757280ca7a8d78edf6011fe65a3"]:
 {{{
 #!CommitTicketReference repository=""
 revision="4e32e47348473757280ca7a8d78edf6011fe65a3"
 Merge pull request #2634 from loic/ticket22424

 Fixed #22424 -- MySQL doesn't accept migrations' one-off default values
 ...
 }}}

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Re: [Django] #22424: Default value for TextField

[Django]

#22424: Default value for TextField
-+-
 Reporter:  Nevsky   |Owner:  Loic
 Type:  Bug  |  Bistuer 
Component:  Migrations   |   Status:  closed
 Severity:  Release blocker  |  Version:
 Keywords:   |  1.7-beta-1
Has patch:  0|   Resolution:  fixed
  Needs tests:  0| Triage Stage:  Accepted
Easy pickings:  0|  Needs documentation:  0
 |  Patch needs improvement:  0
 |UI/UX:  0
-+-
Changes (by Loic Bistuer ):

 * status:  new => closed
 * owner:   => Loic Bistuer 
 * resolution:   => fixed


Comment:

 In [changeset:"1d3d01b4f74f80655ac354f7a39e3908a9b41b14"]:
 {{{
 #!CommitTicketReference repository=""
 revision="1d3d01b4f74f80655ac354f7a39e3908a9b41b14"
 Fixed #22424 -- Fixed handling of default values for TextField/BinaryField
 on MySQL.

 Thanks syphar for the review and suggestions.
 }}}

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Re: [Django] #22424: Default value for TextField

[Django]

#22424: Default value for TextField
-+--
 Reporter:  Nevsky   |Owner:
 Type:  Bug  |   Status:  new
Component:  Migrations   |  Version:  1.7-beta-1
 Severity:  Release blocker  |   Resolution:
 Keywords:   | Triage Stage:  Accepted
Has patch:  0|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+--

Comment (by Loic Bistuer ):

 In [changeset:"6aacb4c9915c83a897dbde0b11cc46131fc7d16e"]:
 {{{
 #!CommitTicketReference repository=""
 revision="6aacb4c9915c83a897dbde0b11cc46131fc7d16e"
 Fixed #22626 -- Allow BinaryField defaults with SQlite.

 Also fixes a slight issue in sqlite3.schema._remake_table where
 default values where quoted with "column name" quoting rules.

 Reference for quoting: http://www.sqlite.org/lang_expr.html

 Thanks Shai Berger for the review. Refs #22424.
 }}}

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Re: [Django] #22424: Default value for TextField

[Django]

#22424: Default value for TextField
-+--
 Reporter:  Nevsky   |Owner:
 Type:  Bug  |   Status:  new
Component:  Migrations   |  Version:  1.7-beta-1
 Severity:  Release blocker  |   Resolution:
 Keywords:   | Triage Stage:  Accepted
Has patch:  0|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+--

Comment (by CollinAnderson):

 #22649 SchemaEditor.quote_value is very fragile.

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Re: [Django] #22424: Default value for TextField

[Django]

#22424: Default value for TextField
-+--
 Reporter:  Nevsky   |Owner:
 Type:  Bug  |   Status:  new
Component:  Migrations   |  Version:  1.7-beta-1
 Severity:  Release blocker  |   Resolution:
 Keywords:   | Triage Stage:  Accepted
Has patch:  0|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+--

Comment (by loic84):

 Updated the PR to fix the issue reported by @syphar and to incorporate the
 fix for #22626.

 Sadly the handling of bytes/strings is still less than ideal in the many
 `quote_value`:
 - `"` in a `default` will break SQLite and MySQL.
 - Oracle doesn't support bytes so breaks on `BinaryField`.
 - Oracle uses `repr` to quote `six.string_types`, which will probably
 result in an extra `u` prefix.

 I propose we open a new ticket to deal with this issue separately.

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Re: [Django] #22424: Default value for TextField

[Django]

#22424: Default value for TextField
-+--
 Reporter:  Nevsky   |Owner:
 Type:  Bug  |   Status:  new
Component:  Migrations   |  Version:  1.7-beta-1
 Severity:  Release blocker  |   Resolution:
 Keywords:   | Triage Stage:  Accepted
Has patch:  0|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+--

Comment (by syphar):

 Update the PR with some comments:
 https://github.com/django/django/pull/2634

 short version:
 PR failing when there are empty or string defaults.
 But with fixed everything (in this ticket) seems fine.

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Re: [Django] #22424: Default value for TextField

[Django]

#22424: Default value for TextField
-+--
 Reporter:  Nevsky   |Owner:
 Type:  Bug  |   Status:  new
Component:  Migrations   |  Version:  1.7-beta-1
 Severity:  Release blocker  |   Resolution:
 Keywords:   | Triage Stage:  Accepted
Has patch:  0|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+--
Changes (by syphar):

 * cc: denis.cornehl@… (added)


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Re: [Django] #22424: Default value for TextField

[Django]

#22424: Default value for TextField
-+--
 Reporter:  Nevsky   |Owner:
 Type:  Bug  |   Status:  new
Component:  Migrations   |  Version:  1.7-beta-1
 Severity:  Release blocker  |   Resolution:
 Keywords:   | Triage Stage:  Accepted
Has patch:  0|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+--
Changes (by syphar):

 * owner:  syphar =>
 * status:  assigned => new


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Re: [Django] #22424: Default value for TextField

[Django]

#22424: Default value for TextField
-+--
 Reporter:  Nevsky   |Owner:  syphar
 Type:  Bug  |   Status:  assigned
Component:  Migrations   |  Version:  1.7-beta-1
 Severity:  Release blocker  |   Resolution:
 Keywords:   | Triage Stage:  Accepted
Has patch:  0|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+--
Changes (by syphar):

 * owner:  nobody => syphar
 * status:  new => assigned


Comment:

 I'll have a look at it and verify the fix.

 (atm I get Nevsky's error when adding the column without the fix, with the
 fix I get another error. But checking it.

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Re: [Django] #22424: Default value for TextField

[Django]

#22424: Default value for TextField
-+--
 Reporter:  Nevsky   |Owner:  nobody
 Type:  Bug  |   Status:  new
Component:  Migrations   |  Version:  1.7-beta-1
 Severity:  Release blocker  |   Resolution:
 Keywords:   | Triage Stage:  Accepted
Has patch:  0|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+--

Comment (by loic84):

 MySQL rejects anything even remotely related to a default for blob/text
 columns (i.e. `ALTER TABLE 'table' ALTER COLUMN 'blob' DROP DEFAULT`).

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Re: [Django] #22424: Default value for TextField

[Django]

#22424: Default value for TextField
-+--
 Reporter:  Nevsky   |Owner:  nobody
 Type:  Bug  |   Status:  new
Component:  Migrations   |  Version:  1.7-beta-1
 Severity:  Release blocker  |   Resolution:
 Keywords:   | Triage Stage:  Accepted
Has patch:  0|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+--

Comment (by andrewgodwin):

 loic84: That PR looks like the right approach to me; will MySQL reject any
 default value on blob/text columns or just empty ones? Oracle has a weird
 behaviour where it treats empty strings as NULL on text columns that
 causes similar issues, but we have a fix for that.

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Re: [Django] #22424: Default value for TextField

[Django]

#22424: Default value for TextField
-+--
 Reporter:  Nevsky   |Owner:  nobody
 Type:  Bug  |   Status:  new
Component:  Migrations   |  Version:  1.7-beta-1
 Severity:  Release blocker  |   Resolution:
 Keywords:   | Triage Stage:  Accepted
Has patch:  0|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+--
Changes (by loic84):

 * cc: loic84 (added)


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Re: [Django] #22424: Default value for TextField

[Django]

#22424: Default value for TextField
-+--
 Reporter:  Nevsky   |Owner:  nobody
 Type:  Bug  |   Status:  new
Component:  Migrations   |  Version:  1.7-beta-1
 Severity:  Release blocker  |   Resolution:
 Keywords:   | Triage Stage:  Accepted
Has patch:  0|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+--

Comment (by loic84):

 @Nevsky could you check if this solves your problem?
 https://github.com/django/django/pull/2634

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Re: [Django] #22424: Default value for TextField

[Django]

#22424: Default value for TextField
-+--
 Reporter:  Nevsky   |Owner:  nobody
 Type:  Bug  |   Status:  new
Component:  Migrations   |  Version:  1.7-beta-1
 Severity:  Release blocker  |   Resolution:
 Keywords:   | Triage Stage:  Accepted
Has patch:  0|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+--

Old description:

> Hi! I start testing Django 1.7beta1. I use MySQL database.
> I add new TextField into my model like that:
>
> {{{
> class Article(models.Model):
> title = models.CharField(max_length=200)
> pub_date = models.DateField()
> text = models.TextField()
> text2 = models.TextField() #new TextField
> }}}
>
> When I type "python manage.py migrate" I am asked to enter default value.
> But BLOB/TEXT columns can't have a default value and if i will type
> something like 'blabla' then after command "python manage.py
> makemigrations" i will see error. I think it is bug :)

New description:

 Hi! I start testing Django 1.7beta1. I use MySQL database.
 I add new TextField into my model like that:

 {{{
 class Article(models.Model):
 title = models.CharField(max_length=200)
 pub_date = models.DateField()
 text = models.TextField()
 text2 = models.TextField() #new TextField
 }}}

 When I type "python manage.py makemigrations" I am asked to enter default
 value.
 But BLOB/TEXT columns can't have a default value and if i will type
 something like 'blabla' then after command "python manage.py migrate" i
 will see error. I think it is bug :)

--

Comment (by loic84):

 Fixed the name of the commands in the ticket description.

 I originally assumed this was an issue before the migrate step, but it's
 indeed an SQL issue due to one-off defaults, Django uses db defaults for
 these.

 The fix for MySQL is to not provide a default for BLOB/TEXT in the
 SchemaEditor. Although we'll now need to propagate the default value
 manually.

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Re: [Django] #22424: Default value for TextField

[Django]

#22424: Default value for TextField
-+--
 Reporter:  Nevsky   |Owner:  nobody
 Type:  Bug  |   Status:  new
Component:  Migrations   |  Version:  1.7-beta-1
 Severity:  Release blocker  |   Resolution:
 Keywords:   | Triage Stage:  Accepted
Has patch:  0|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+--

Comment (by timo):

 Loic, I'm not sure using `''` as an automatic default is better than the
 current situation. Why not give the user the option of entering something
 else besides that (especially if `blank=True`)?

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Re: [Django] #22424: Default value for TextField

[Django]

#22424: Default value for TextField
-+--
 Reporter:  Nevsky   |Owner:  nobody
 Type:  Bug  |   Status:  new
Component:  Migrations   |  Version:  1.7-beta-1
 Severity:  Release blocker  |   Resolution:
 Keywords:   | Triage Stage:  Accepted
Has patch:  0|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+--

Comment (by Nevsky):

 Replying to [comment:1 loic84]:
 > Regarding the error with `'blabla'`, did you actually type the quotes?
 That prompt interprets Python, so if you just type `blabla` it'll throw an
 error because it can't find a variable named "blabla".
 Yes, I type the quotes and migration successfully making. I get error when
 I trying to apply created migration because it contains default value for
 field that can't have default value in MySQL database :)

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Ticket URL: 
Django 
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Re: [Django] #22424: Default value for TextField

[Django]

#22424: Default value for TextField
-+--
 Reporter:  Nevsky   |Owner:  nobody
 Type:  Bug  |   Status:  new
Component:  Migrations   |  Version:  1.7-beta-1
 Severity:  Release blocker  |   Resolution:
 Keywords:   | Triage Stage:  Accepted
Has patch:  0|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+--
Changes (by loic84):

 * needs_better_patch:   => 0
 * needs_docs:   => 0
 * needs_tests:   => 0
 * stage:  Unreviewed => Accepted


Comment:

 Hi @Nevsky, `default` is actually handled at the Python level, not added
 to the SQL, so that shouldn't be an issue.

 I can reproduce that adding a `TextField()` triggers the questioner which
 is probably confusing, I wonder if we can't just use `''` as default
 automatically when `default=NOT_PROVIDED` and
 `empty_strings_allowed=True`. Accepting the ticket on this basis.

 Regarding the error with `'blabla'`, did you actually type the quotes?
 That prompt interprets Python, so if you just type `blabla` it'll throw an
 error because it can't find a variable named "blabla".

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[Django] #22424: Default value for TextField

[Django]

#22424: Default value for TextField
-+
 Reporter:  Nevsky   |  Owner:  nobody
 Type:  Bug  | Status:  new
Component:  Migrations   |Version:  1.7-beta-1
 Severity:  Release blocker  |   Keywords:
 Triage Stage:  Unreviewed   |  Has patch:  0
Easy pickings:  0|  UI/UX:  0
-+
 Hi! I start testing Django 1.7beta1. I use MySQL database.
 I add new TextField into my model like that:

 {{{
 class Article(models.Model):
 title = models.CharField(max_length=200)
 pub_date = models.DateField()
 text = models.TextField()
 text2 = models.TextField() #new TextField
 }}}

 When I type "python manage.py migrate" I am asked to enter default value.
 But BLOB/TEXT columns can't have a default value and if i will type
 something like 'blabla' then after command "python manage.py
 makemigrations" i will see error. I think it is bug :)

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Django 
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