aboutsummaryrefslogtreecommitdiffstats
path: root/db2html.txi
blob: 6366f8789f5caf23eb047129ecf1a10a43621bce (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
@code{(require 'db->html)}
@ftindex db->html


@defun html:table options row @dots{}

@end defun


@defun html:caption caption align


@defunx html:caption caption
@var{align} can be @samp{top} or @samp{bottom}.
@end defun


@defun html:heading columns
Outputs a heading row for the currently-started table.
@end defun


@defun html:href-heading columns uris
Outputs a heading row with column-names @var{columns} linked to URIs @var{uris}.
@end defun


@defun html:linked-row-converter k foreigns


The positive integer @var{k} is the primary-key-limit (number of
primary-keys) of the table.  @var{foreigns} is a list of the filenames of
foreign-key field pages and #f for non foreign-key fields.

@code{html:linked-row-converter} returns a procedure taking a row for its single argument.  This
returned procedure returns the html string for that table row.
@end defun


@defun table-name->filename table-name

Returns the symbol @var{table-name} converted to a filename.
@end defun


@defun table->linked-html caption db table-name match-key1 @dots{}

Returns HTML string for @var{db} table @var{table-name} chopped into 50-row HTML tables.
Every foreign-key value is linked to the page (of the table)
defining that key.

The optional @var{match-key1} @dots{} arguments restrict actions to a subset of
the table.  @xref{Table Operations, match-key}.
@end defun


@defun table->linked-page db table-name index-filename arg @dots{}

Returns a complete HTML page.  The string @var{index-filename} names the page which
refers to this one.

The optional @var{args} @dots{} arguments restrict actions to a subset of
the table.  @xref{Table Operations, match-key}.
@end defun


@defun catalog->html db caption arg @dots{}

Returns HTML string for the catalog table of @var{db}.
@end defun

@subsection HTML editing tables

@noindent A client can modify one row of an editable table at a time.
For any change submitted, these routines check if that row has been
modified during the time the user has been editing the form.  If so,
an error page results.

@noindent The behavior of edited rows is:

@itemize @bullet
@item
If no fields are changed, then no change is made to the table.
@item
If the primary keys equal null-keys (parameter defaults), and no other
user has modified that row, then that row is deleted.
@item
If only primary keys are changed, there are non-key fields, and no
row with the new keys is in the table, then the old row is
deleted and one with the new keys is inserted.
@item
If only non-key fields are changed, and that row has not been
modified by another user, then the row is changed to reflect the
fields.
@item
If both keys and non-key fields are changed, and no row with the
new keys is in the table, then a row is created with the new
keys and fields.
@item
If fields are changed, all fields are primary keys, and no row with
the new keys is in the table, then a row is created with the new
keys.
@end itemize

@noindent After any change to the table, a @code{sync-database} of the
database is performed.


@defun command:modify-table table-name null-keys update delete retrieve


@defunx command:modify-table table-name null-keys update delete

@defunx command:modify-table table-name null-keys update

@defunx command:modify-table table-name null-keys

Returns procedure (of @var{db}) which returns procedure to modify
row of @var{table-name}.  @var{null-keys} is the list of @dfn{null} keys indicating the row is
@cindex null
to be deleted when any matches its corresponding primary key.
Optional arguments @var{update}, @var{delete}, and @var{retrieve} default to the @code{row:update},
@code{row:delete}, and @code{row:retrieve} of @var{table-name} in @var{db}.
@end defun


@defun command:make-editable-table rdb table-name arg @dots{}
Given @var{table-name} in @var{rdb}, creates parameter and @code{*command*} tables
for editing one row of @var{table-name} at a time.  @code{command:make-editable-table} returns a procedure taking a
row argument which returns the HTML string for editing that row.

Optional @var{args} are expressions (lists) added to the call to
@code{command:modify-table}.

The domain name of a column determines the expected arity of the data
stored in that column.  Domain names ending in:

@table @samp
@item *
have arity @samp{nary};
@item +
have arity @samp{nary1}.
@end table
@end defun


@defun html:editable-row-converter k names edit-point edit-converter


The positive integer @var{k} is the primary-key-limit (number of
primary-keys) of the table.  @var{names} is a list of the field-names.  @var{edit-point} is
the list of primary-keys denoting the row to edit (or #f).  @var{edit-converter} is the
procedure called with @var{k}, @var{names}, and the row to edit.

@code{html:editable-row-converter} returns a procedure taking a row for its single argument.  This
returned procedure returns the html string for that table row.

Each HTML table constructed using @code{html:editable-row-converter} has first @var{k} fields (typically
the primary key fields) of each row linked to a text encoding of these
fields (the result of calling @code{row->anchor}).  The page so
referenced typically allows the user to edit fields of that row.
@end defun

@subsection HTML databases


@defun db->html-files db dir index-filename caption
@var{db} must be a relational database.  @var{dir} must be #f or a
non-empty string naming an existing sub-directory of the current
directory.

@code{db->html-files} creates an html page for each table in the database @var{db} in the
sub-directory named @var{dir}, or the current directory if @var{dir} is #f.  The
top level page with the catalog of tables (captioned @var{caption}) is written
to a file named @var{index-filename}.
@end defun


@defun db->html-directory db dir index-filename


@defunx db->html-directory db dir
@var{db} must be a relational database.  @var{dir} must be a non-empty
string naming an existing sub-directory of the current directory or
one to be created.  The optional string @var{index-filename} names the filename of the
top page, which defaults to @file{index.html}.

@code{db->html-directory} creates sub-directory @var{dir} if neccessary, and calls
@code{(db->html-files @var{db} @var{dir} @var{index-filename} @var{dir})}.  The @samp{file:} URI of @var{index-filename} is
returned.
@end defun


@defun db->netscape db dir index-filename


@defunx db->netscape db dir
@code{db->netscape} is just like @code{db->html-directory}, but calls
@code{browse-url} with the uri for the top page after the
pages are created.
@end defun