Changes between Version 4 and Version 5 of TracReports


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Timestamp:
Oct 21, 2016, 7:54:42 PM (14 months ago)
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trac
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  • TracReports

    v4 v5  
    1 = Trac Reports =
     1= Trac Reports
     2
    23[[TracGuideToc]]
    34
    4 The Trac reports module provides a simple, yet powerful reporting facility
    5 to present information about tickets in the Trac database.
    6 
    7 Rather than have its own report definition format, TracReports relies on standard SQL
    8 `SELECT` statements for custom report definition.
    9 
    10   '''Note:''' ''The report module is being phased out in its current form because it seriously limits the ability of the Trac team to make adjustments to the underlying database schema. We believe that the [wiki:TracQuery query module] is a good replacement that provides more flexibility and better usability. While there are certain reports that cannot yet be handled by the query module, we intend to further enhance it so that at some point the reports module can be completely removed. This also means that there will be no major enhancements to the report module anymore.''
    11 
    12   ''You can already completely replace the reports module by the query module simply by disabling the former in [wiki:TracIni trac.ini]:''
    13   {{{
     5The Trac reports module provides a simple, yet powerful reporting facility to present information about tickets in the Trac database.
     6
     7Rather than have its own report definition format, TracReports relies on standard SQL `SELECT` statements for custom report definition.
     8
     9  '''Note:''' The report module is being phased out in its current form because it seriously limits the ability of the Trac team to make adjustments to the underlying database schema. We believe that the [wiki:TracQuery query module] is a good replacement that provides more flexibility and better usability. While there are certain reports that cannot yet be handled by the query module, we intend to further enhance it so that at some point the reports module can be completely removed. This also means that there will be no major enhancements to the report module anymore.
     10
     11  You can already completely replace the reports module by the query module simply by disabling the former in [wiki:TracIni trac.ini]:
     12  {{{#!ini
    1413  [components]
    1514  trac.ticket.report.* = disabled
    1615  }}}
    17   ''This will make the query module the default handler for the “View Tickets” navigation item. We encourage you to try this configuration and report back what kind of features of reports you are missing, if any.''
     16  This will make the query module the default handler for the “View Tickets” navigation item. We encourage you to try this configuration and report back what kind of features of reports you are missing, if any.
    1817
    1918A report consists of these basic parts:
     
    2423 * '''Footer''' — Links to alternative download formats for this report.
    2524
    26 == Changing Sort Order ==
     25== Changing Sort Order
     26
    2727Simple reports - ungrouped reports to be specific - can be changed to be sorted by any column simply by clicking the column header.
    2828
    2929If a column header is a hyperlink (red), click the column you would like to sort by. Clicking the same header again reverses the order.
    3030
    31 == Changing Report Numbering ==
    32 There may be instances where you need to change the ID of the report, perhaps to organize the reports better. At present this requires changes to the trac database. The ''report'' table has the following schema ''(since 0.10)'':
     31== Changing Report Numbering
     32
     33There may be instances where you need to change the ID of the report, perhaps to organize the reports better. At present this requires changes to the trac database. The ''report'' table has the following schema:
    3334 * id integer PRIMARY KEY
    3435 * author text
     
    3738 * description text
    3839Changing the ID changes the shown order and number in the ''Available Reports'' list and the report's perma-link. This is done by running something like:
    39 {{{
    40 update report set id=5 where id=3;
    41 }}}
    42 Keep in mind that the integrity has to be maintained (i.e., ID has to be unique, and you don't want to exceed the max, since that's managed by SQLite someplace).
     40{{{#!sql
     41UPDATE report SET id = 5 WHERE id = 3;
     42}}}
     43Keep in mind that the integrity has to be maintained, ie ID has to be unique, and you don't want to exceed the max, since that's managed by SQLite someplace.
    4344
    4445You may also need to update or remove the report number stored in the report or query.
    4546
    46 == Navigating Tickets ==
     47== Navigating Tickets
     48
    4749Clicking on one of the report results will take you to that ticket. You can navigate through the results by clicking the ''Next Ticket'' or ''Previous Ticket'' links just below the main menu bar, or click the ''Back to Report'' link to return to the report page.
    4850
    49 You can safely edit any of the tickets and continue to navigate through the results using the ''!Next/Previous/Back to Report'' links after saving your results, but when you return to the report, there will be no hint about what has changed, as would happen if you were navigating a list of tickets obtained from a query (see TracQuery#NavigatingTickets). ''(since 0.11)''
    50 
    51 == Alternative Download Formats ==
     51You can safely edit any of the tickets and continue to navigate through the results using the ''!Next/Previous/Back to Report'' links after saving your results, but when you return to the report, there will be no hint about what has changed, as would happen if you were navigating a list of tickets obtained from a query (see TracQuery#NavigatingTickets).
     52
     53== Alternative Download Formats
     54
    5255Aside from the default HTML view, reports can also be exported in a number of alternative formats.
    5356At the bottom of the report page, you will find a list of available data formats. Click the desired link to
    5457download the alternative report format.
    5558
    56 === Comma-delimited - CSV (Comma Separated Values) ===
     59=== Comma-delimited - CSV (Comma Separated Values)
     60
    5761Export the report as plain text, each row on its own line, columns separated by a single comma (',').
    5862'''Note:''' The output is fully escaped so carriage returns, line feeds, and commas will be preserved in the output.
    5963
    60 === Tab-delimited ===
     64=== Tab-delimited
     65
    6166Like above, but uses tabs (\t) instead of comma.
    6267
    63 === RSS - XML Content Syndication ===
     68=== RSS - XML Content Syndication
     69
    6470All reports support syndication using XML/RSS 2.0. To subscribe to an RSS feed, click the orange 'XML' icon at the bottom of the page. See TracRss for general information on RSS support in Trac.
    6571
    66 ----
    67 
    68 == Creating Custom Reports ==
    69 
    70 ''Creating a custom report requires a comfortable knowledge of SQL.''
    71 
    72 A report is basically a single named SQL query, executed and presented by
    73 Trac.  Reports can be viewed and created from a custom SQL expression directly
    74 in the web interface.
    75 
    76 Typically, a report consists of a SELECT-expression from the 'ticket' table,
    77 using the available columns and sorting the way you want it.
    78 
    79 == Ticket columns ==
     72== Creating Custom Reports
     73
     74Creating a custom report requires a comfortable knowledge of SQL.
     75
     76Note that you need to set up [TracPermissions#Reports permissions] in order to see the buttons for adding or editing reports.
     77
     78A report is basically a single named SQL query, executed and presented by Trac. Reports can be viewed and created from a custom SQL expression directly in the web interface.
     79
     80Typically, a report consists of a SELECT-expression from the 'ticket' table, using the available columns and sorting the way you want it.
     81
     82== Ticket columns
     83
    8084The ''ticket'' table has the following columns:
    8185 * id
     
    100104
    101105Example: '''All active tickets, sorted by priority and time'''
    102 {{{
    103 SELECT id AS ticket, status, severity, priority, owner,
    104        time AS created, summary FROM ticket
    105   WHERE status IN ('new', 'assigned', 'reopened')
    106   ORDER BY priority, time
    107 }}}
    108 
    109 ---
    110 
    111 == Advanced Reports: Dynamic Variables ==
     106{{{#!sql
     107SELECT id AS ticket, status, severity, priority, owner, time AS created, summary
     108FROM ticket
     109WHERE status IN ('new', 'assigned', 'reopened')
     110ORDER BY priority, time
     111}}}
     112
     113== Advanced Reports: Dynamic Variables
     114
    112115For more flexible reports, Trac supports the use of ''dynamic variables'' in report SQL statements.
    113116In short, dynamic variables are ''special'' strings that are replaced by custom data before query execution.
    114117
    115 === Using Variables in a Query ===
     118=== Using Variables in a Query
     119
    116120The syntax for dynamic variables is simple, any upper case word beginning with '$' is considered a variable.
    117121
    118122Example:
    119 {{{
     123{{{#!sql
    120124SELECT id AS ticket,summary FROM ticket WHERE priority=$PRIORITY
    121125}}}
    122126
    123 To assign a value to $PRIORITY when viewing the report, you must define it as an argument in the report URL, leaving out the leading '$'.
    124 
    125 Example:
     127To assign a value to $PRIORITY when viewing the report, you must define it as an argument in the report URL, leaving out the leading '$':
    126128{{{
    127129 http://trac.edgewall.org/reports/14?PRIORITY=high
    128130}}}
    129131
    130 To use multiple variables, separate them with an '&'.
    131 
    132 Example:
     132To use multiple variables, separate them with an '&':
    133133{{{
    134134 http://trac.edgewall.org/reports/14?PRIORITY=high&SEVERITY=critical
    135135}}}
    136136
    137 
    138 === !Special/Constant Variables ===
     137=== !Special/Constant Variables
     138
    139139There is one dynamic variable whose value is set automatically (the URL does not have to be changed) to allow practical reports.
    140140
    141141 * $USER — Username of logged in user.
    142142
    143 Example (''List all tickets assigned to me''):
    144 {{{
     143Example: List all tickets assigned to me:
     144{{{#!sql
    145145SELECT id AS ticket,summary FROM ticket WHERE owner=$USER
    146146}}}
    147147
    148 
    149 ----
    150 
    151 
    152 == Advanced Reports: Custom Formatting ==
    153 Trac is also capable of more advanced reports, including custom layouts,
    154 result grouping and user-defined CSS styles. To create such reports, we'll use
    155 specialized SQL statements to control the output of the Trac report engine.
    156 
    157 == Special Columns ==
    158 To format reports, TracReports looks for 'magic' column names in the query
    159 result. These 'magic' names are processed and affect the layout and style of the
    160 final report.
    161 
    162 === Automatically formatted columns ===
     148== Advanced Reports: Custom Formatting
     149
     150Trac is also capable of more advanced reports, including custom layouts, result grouping and user-defined CSS styles. To create such reports, we will use specialized SQL statements to control the output of the Trac report engine.
     151
     152=== Special Columns
     153
     154To format reports, TracReports looks for 'magic' column names in the query result. These 'magic' names are processed and affect the layout and style of the final report.
     155
     156=== Automatically formatted columns
     157
    163158 * '''ticket''' — Ticket ID number. Becomes a hyperlink to that ticket.
    164159 * '''id''' — same as '''ticket''' above when '''realm''' is not set
    165160 * '''realm''' — together with '''id''', can be used to create links to other resources than tickets (e.g. a realm of ''wiki'' and an ''id'' to a page name will create a link to that wiki page)
     161   - for some kind of resources, it may be necessary to specify their ''parent'' resources (e.g. for ''changeset'', which ''repos'') and this can be achieved using the '''parent_realm''' and '''parent_id''' columns
    166162 * '''created, modified, date, time''' — Format cell as a date and/or time.
    167163 * '''description''' — Ticket description field, parsed through the wiki engine.
    168164
    169165'''Example:'''
    170 {{{
     166{{{#!sql
    171167SELECT id AS ticket, created, status, summary FROM ticket
    172168}}}
     
    176172See trac:wiki/CookBook/Configuration/Reports for some example of creating reports for realms other than ''ticket''.
    177173
    178 === Custom formatting columns ===
     174=== Custom formatting columns
     175
    179176Columns whose names begin and end with 2 underscores (Example: '''`__color__`''') are
    180177assumed to be ''formatting hints'', affecting the appearance of the row.
     
    193190</div>
    194191}}}
    195  * '''`__style__`''' — A custom CSS style expression to use for the current row.
     192 * '''`__style__`''' — A custom CSS style expression to use on the `<tr>` element of the current row.
     193 * '''`__class__`''' — Zero or more space-separated CSS class names to be set on the `<tr>` element of the current row. These classes are added to the class name derived from `__color__` and the odd / even indicator.
    196194
    197195'''Example:''' ''List active tickets, grouped by milestone, group header linked to milestone page, colored by priority''
    198 {{{
     196{{{#!sql
    199197SELECT p.value AS __color__,
    200198     t.milestone AS __group__,
    201199     '../milestone/' || t.milestone AS __grouplink__,
    202200     (CASE owner WHEN 'daniel' THEN 'font-weight: bold; background: red;' ELSE '' END) AS __style__,
    203        t.id AS ticket, summary
    204   FROM ticket t,enum p
    205   WHERE t.status IN ('new', 'assigned', 'reopened')
    206     AND p.name=t.priority AND p.type='priority'
    207   ORDER BY t.milestone, p.value, t.severity, t.time
    208 }}}
    209 
    210 '''Note:''' A table join is used to match ''ticket'' priorities with their
    211 numeric representation from the ''enum'' table.
     201     t.id AS ticket, summary
     202FROM ticket t,enum p
     203WHERE t.status IN ('new', 'assigned', 'reopened')
     204  AND p.name = t.priority AND p.type = 'priority'
     205ORDER BY t.milestone, p.value, t.severity, t.time
     206}}}
     207
     208'''Note:''' A table join is used to match ''ticket'' priorities with their numeric representation from the ''enum'' table.
    212209
    213210=== Changing layout of report rows === #column-syntax
    214 By default, all columns on each row are display on a single row in the HTML
    215 report, possibly formatted according to the descriptions above. However, it's
    216 also possible to create multi-line report entries.
     211
     212By default, all columns on each row are display on a single row in the HTML report, possibly formatted according to the descriptions above. However, it is also possible to create multi-line report entries.
    217213
    218214 * '''`column_`''' — ''Break row after this''. By appending an underscore ('_') to the column name, the remaining columns will be continued on a second line.
     
    225221'''Example:''' ''List active tickets, grouped by milestone, colored by priority, with  description and multi-line layout''
    226222
    227 {{{
     223{{{#!sql
    228224SELECT p.value AS __color__,
    229225       t.milestone AS __group__,
     
    236232       description AS _description_,                    -- ## Uses a full row
    237233       changetime AS _changetime, reporter AS _reporter -- ## Hidden from HTML output
    238   FROM ticket t,enum p
    239   WHERE t.status IN ('new', 'assigned', 'reopened')
    240     AND p.name=t.priority AND p.type='priority'
    241   ORDER BY t.milestone, p.value, t.severity, t.time
    242 }}}
    243 
    244 === Reporting on custom fields ===
    245 
    246 If you have added custom fields to your tickets (a feature since v0.8, see TracTicketsCustomFields), you can write a SQL query to cover them. You'll need to make a join on the ticket_custom table, but this isn't especially easy.
     234FROM ticket t,enum p
     235WHERE t.status IN ('new', 'assigned', 'reopened')
     236  AND p.name = t.priority AND p.type = 'priority'
     237ORDER BY t.milestone, p.value, t.severity, t.time
     238}}}
     239
     240=== Reporting on custom fields
     241
     242If you have added custom fields to your tickets (see TracTicketsCustomFields), you can write a SQL query to cover them. You'll need to make a join on the ticket_custom table, but this isn't especially easy.
    247243
    248244If you have tickets in the database ''before'' you declare the extra fields in trac.ini, there will be no associated data in the ticket_custom table. To get around this, use SQL's "LEFT OUTER JOIN" clauses. See [trac:TracIniReportCustomFieldSample TracIniReportCustomFieldSample] for some examples.
    249245
    250 '''Note that you need to set up permissions in order to see the buttons for adding or editing reports.'''
     246=== A note about SQL rewriting #rewriting
     247
     248Beyond the relatively trivial replacement of dynamic variables, the SQL query is also altered in order to support two features of the reports:
     249 1. [#sort-order changing the sort order]
     250 1. pagination support (limitation of the number of result rows displayed on each page)
     251In order to support the first feature, the sort column is inserted in the `ORDER BY` clause in the first position or in the second position if a `__group__` column is specified (an `ORDER BY` clause is created if needed). In order to support pagination, a `LIMIT ... OFFSET ...` clause is appended.
     252The query might be too complex for the automatic rewrite to work correctly, resulting in an erroneous query. In this case you still have the possibility to control exactly how the rewrite is done by manually inserting the following tokens:
     253 - `@SORT_COLUMN@`, the place where the name of the selected sort column will be inserted,
     254 - `@LIMIT_OFFSET@`, the place where the pagination support clause will be added
     255Note that if you write them after an SQL comment, `--`, you'll effectively disable rewriting if this is what you want!
     256
     257Let's take an example, consider the following SQL query:
     258{{{#!sql
     259-- ## 4: Assigned, Active Tickets by Owner ## --
     260
     261--
     262-- List assigned tickets, group by ticket owner, sorted by priority.
     263--
     264
     265SELECT p.value AS __color__,
     266   owner AS __group__,
     267   id AS ticket, summary, component, milestone, t.type AS type, severity, time AS created,
     268   changetime AS _changetime, description AS _description,
     269   reporter AS _reporter
     270FROM ticket t,enum p
     271WHERE status = 'assigned'
     272  AND p.name = t.priority AND p.type = 'priority'
     273ORDER BY __group__, p.value, severity, time
     274}}}
     275
     276The automatic rewrite will be the following (4 rows per page, page 2, sorted by `component`):
     277{{{#!sql
     278SELECT p.value AS __color__,
     279   owner AS __group__,
     280   id AS ticket, summary, component, milestone, t.type AS type, severity, time AS created,
     281   changetime AS _changetime, description AS _description,
     282   reporter AS _reporter
     283FROM ticket t,enum p
     284WHERE status = 'assigned'
     285  AND p.name = t.priority AND p.type = 'priority'
     286ORDER BY __group__ ASC, `component` ASC,  __group__, p.value, severity, time
     287LIMIT 4 OFFSET 4
     288}}}
     289
     290The equivalent SQL query with the rewrite tokens would have been:
     291{{{#!sql
     292SELECT p.value AS __color__,
     293   owner AS __group__,
     294   id AS ticket, summary, component, milestone, t.type AS type, severity, time AS created,
     295   changetime AS _changetime, description AS _description,
     296   reporter AS _reporter
     297FROM ticket t,enum p
     298WHERE status = 'assigned'
     299  AND p.name = t.priority AND p.type = 'priority'
     300ORDER BY __group__, @SORT_COLUMN@, p.value, severity, time
     301@LIMIT_OFFSET@
     302}}}
     303
     304If you want to always sort first by priority and only then by the user selected sort column, simply use the following `ORDER BY` clause:
     305{{{#!sql
     306ORDER BY __group__, p.value, @SORT_COLUMN@, severity, time
     307}}}
    251308
    252309----