author | Rémi Cardona <remi.cardona@logilab.fr> |
Thu, 09 Jul 2015 17:03:50 +0200 | |
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3.19 (28/04/2015) |
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================= |
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New functionalities |
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------------------- |
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* implement Cross Origin Resource Sharing (CORS) |
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(see `#2491768 <http://www.cubicweb.org/2491768>`_) |
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* system_source.create_eid can get a range of IDs, to reduce overhead of batch |
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entity creation |
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Behaviour Changes |
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----------------- |
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* The anonymous property of Session and Connection are now computed from the |
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related user login. If it matches the ``anonymous-user`` in the config the |
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connection is anonymous. Beware that the ``anonymous-user`` config is web |
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specific. Therefore, no session may be anonymous in a repository only setup. |
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New Repository Access API |
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------------------------- |
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Connection replaces Session |
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~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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A new explicit Connection object replaces Session as the main repository entry |
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point. Connection holds all the necessary methods to be used server-side |
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(``execute``, ``commit``, ``rollback``, ``call_service``, ``entity_from_eid``, |
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etc...). One obtains a new Connection object using ``session.new_cnx()``. |
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Connection objects need to have an explicit begin and end. Use them as a context |
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manager to never miss an end:: |
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with session.new_cnx() as cnx: |
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cnx.execute('INSERT Elephant E, E name "Babar"') |
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cnx.commit() |
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cnx.execute('INSERT Elephant E, E name "Celeste"') |
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cnx.commit() |
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# Once you get out of the "with" clause, the connection is closed. |
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Using the same Connection object in multiple threads will give you access to the |
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same Transaction. However, Connection objects are not thread safe (hence at your |
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own risks). |
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``repository.internal_session`` is deprecated in favor of |
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``repository.internal_cnx``. Note that internal connections are now `safe` by default, |
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i.e. the integrity hooks are enabled. |
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Backward compatibility is preserved on Session. |
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dbapi vs repoapi |
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~~~~~~~~~~~~~~~~ |
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A new API has been introduced to replace the dbapi. It is called `repoapi`. |
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There are three relevant functions for now: |
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* ``repoapi.get_repository`` returns a Repository object either from an |
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URI when used as ``repoapi.get_repository(uri)`` or from a config |
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when used as ``repoapi.get_repository(config=config)``. |
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* ``repoapi.connect(repo, login, **credentials)`` returns a ClientConnection |
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associated with the user identified by the credentials. The |
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ClientConnection is associated with its own Session that is closed |
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when the ClientConnection is closed. A ClientConnection is a |
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Connection-like object to be used client side. |
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* ``repoapi.anonymous_cnx(repo)`` returns a ClientConnection associated |
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with the anonymous user if described in the config. |
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repoapi.ClientConnection replace dbapi.Connection and company |
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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On the client/web side, the Request is now using a ``repoapi.ClientConnection`` |
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instead of a ``dbapi.connection``. The ``ClientConnection`` has multiple backward |
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compatible methods to make it look like a ``dbapi.Cursor`` and ``dbapi.Connection``. |
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Session used on the Web side are now the same than the one used Server side. |
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Some backward compatibility methods have been installed on the server side Session |
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to ease the transition. |
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The authentication stack has been altered to use the ``repoapi`` instead of |
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the ``dbapi``. Cubes adding new element to this stack are likely to break. |
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Session data can be accessed using the cnx.data dictionary, while |
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transaction data is available through cnx.transaction_data. These |
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replace the [gs]et_shared_data methods with optional txid kwarg. |
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New API in tests |
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~~~~~~~~~~~~~~~~ |
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All current methods and attributes used to access the repo on ``CubicWebTC`` are |
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96 |
deprecated. You may now use a ``RepoAccess`` object. A ``RepoAccess`` object is |
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97 |
linked to a new ``Session`` for a specified user. It is able to create |
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98 |
``Connection``, ``ClientConnection`` and web side requests linked to this |
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99 |
session:: |
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100 |
|
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101 |
access = self.new_access('babar') # create a new RepoAccess for user babar |
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102 |
with access.repo_cnx() as cnx: |
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103 |
# some work with server side cnx |
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104 |
cnx.execute(...) |
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105 |
cnx.commit() |
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106 |
cnx.execute(...) |
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107 |
cnx.commit() |
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108 |
|
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109 |
with access.client_cnx() as cnx: |
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110 |
# some work with client side cnx |
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111 |
cnx.execute(...) |
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112 |
cnx.commit() |
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113 |
|
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114 |
with access.web_request(elephant='babar') as req: |
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115 |
# some work with client side cnx |
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116 |
elephant_name = req.form['elephant'] |
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117 |
req.execute(...) |
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118 |
req.cnx.commit() |
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119 |
|
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120 |
By default ``testcase.admin_access`` contains a ``RepoAccess`` object for the |
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121 |
default admin session. |
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122 |
|
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[repository] add an ``internal_cnx`` method to replace ``internal_session``
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123 |
|
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124 |
API changes |
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125 |
----------- |
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126 |
|
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127 |
* ``RepositorySessionManager.postlogin`` is now called with two arguments, |
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128 |
request and session. And this now happens before the session is linked to the |
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129 |
request. |
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130 |
|
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131 |
* ``SessionManager`` and ``AuthenticationManager`` now take a repo object at |
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132 |
initialization time instead of a vreg. |
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133 |
|
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134 |
* The ``async`` argument of ``_cw.call_service`` has been dropped. All calls are |
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135 |
now synchronous. The zmq notification bus looks like a good replacement for |
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136 |
most async use cases. |
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137 |
|
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138 |
* ``repo.stats()`` is now deprecated. The same information is available through |
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139 |
a service (``_cw.call_service('repo_stats')``). |
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140 |
|
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141 |
* ``repo.gc_stats()`` is now deprecated. The same information is available through |
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142 |
a service (``_cw.call_service('repo_gc_stats')``). |
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143 |
|
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[server] Refactor Repository.register_user into a CubicWeb service (closes #3020639)
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144 |
* ``repo.register_user()`` is now deprecated. The functionality is now |
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145 |
available through a service (``_cw.call_service('register_user')``). |
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146 |
|
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147 |
* ``request.set_session`` no longer takes an optional ``user`` argument. |
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148 |
|
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149 |
* CubicwebTC does not have repo and cnx as class attributes anymore. They are |
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150 |
standard instance attributes. ``set_cnx`` and ``_init_repo`` class methods |
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151 |
become instance methods. |
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152 |
|
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[connection] deprecated free_cnset and set_cnxset
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153 |
* ``set_cnxset`` and ``free_cnxset`` are deprecated. cnxset are now |
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154 |
automatically managed. |
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155 |
|
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156 |
* The implementation of cascading deletion when deleting `composite` |
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157 |
entities has changed. There comes a semantic change: merely deleting |
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158 |
a composite relation does not entail any more the deletion of the |
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159 |
component side of the relation. |
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160 |
|
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161 |
* ``_cw.user_callback`` and ``_cw.user_rql_callback`` are deprecated. Users |
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162 |
are encouraged to write an actual controller (e.g. using ``ajaxfunc``) |
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163 |
instead of storing a closure in the session data. |
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164 |
|
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165 |
* A new ``entity.cw_linkable_rql`` method provides the rql to fetch all entities |
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166 |
that are already or may be related to the current entity using the given |
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167 |
relation. |
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168 |
|
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169 |
|
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170 |
Deprecated Code Drops |
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171 |
--------------------- |
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172 |
|
9016 | 173 |
* session.hijack_user mechanism has been dropped. |
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174 |
|
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175 |
* EtypeRestrictionComponent has been removed, its functionality has been |
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176 |
replaced by facets a while ago. |
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177 |
|
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[doc] Add removal of old multi-sources to 3.19 release notes
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178 |
* the old multi-source support has been removed. Only copy-based sources |
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179 |
remain, such as datafeed or ldapfeed. |
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180 |